quiet git init command not to print out hint

Summary:
Git client was updated and it started outputting a hint that breaks our tests. It has no meaning in tests so just quiet it.

```
➜  fbcode git init
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint:   git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint:   git branch -m <name>
Initialized empty Git repository in /data/users/mzr/fbsource/fbcode/.git/
```

Reviewed By: StanislavGlebik

Differential Revision: D27232853

fbshipit-source-id: 683ebebb36049adb758e7c26f843f12159a45301

eden/mononoke/tests/integration/test-gitimport-octopus.t

@@ -12,8 +12,7 @@
 # Setup git repsitory
   $ mkdir "$GIT_REPO"
   $ cd "$GIT_REPO"
-  $ git init
-  Initialized empty Git repository in $TESTTMP/repo-git/.git/
+  $ git init -q
   $ git commit --allow-empty -m "root commit"
   [master (root-commit) d53a2ef] root commit
   $ git branch root

eden/scm/tests/test-convert-git.t

@@ -617,8 +617,7 @@ test converting certain branches
 
   $ mkdir git-testrevs
   $ cd git-testrevs
-  $ git init
-  Initialized empty Git repository in $TESTTMP/git-testrevs/.git/
+  $ git init -q
   $ echo a >> a ; git add a > /dev/null; git commit -m 'first' > /dev/null
   $ echo a >> a ; git add a > /dev/null; git commit -m 'master commit' > /dev/null
   $ git checkout -b goodbranch 'HEAD^'
@@ -808,8 +807,7 @@ skip submodules in the conversion
   .gitmodules-renamed
 
 convert using a different remote prefix
-  $ git init git-repo7
-  Initialized empty Git repository in $TESTTMP/git-repo7/.git/
+  $ git init -q git-repo7
   $ cd git-repo7
 TODO: it'd be nice to use (?) lines instead of grep -v to handle the
 git output variance, but that doesn't currently work in the middle of
@@ -883,8 +881,7 @@ damage git repository by renaming a tree object
 
 test for escaping the repo name (CVE-2016-3069)
 
-  $ git init '`echo pwned >COMMAND-INJECTION`'
-  Initialized empty Git repository in $TESTTMP/`echo pwned >COMMAND-INJECTION`/.git/
+  $ git init -q '`echo pwned >COMMAND-INJECTION`'
   $ cd '`echo pwned >COMMAND-INJECTION`'
   $ git commit -q --allow-empty -m 'empty'
   $ cd ..
@@ -900,8 +897,7 @@ test for escaping the repo name (CVE-2016-3069)
 
 test for safely passing paths to git (CVE-2016-3105)
 
-  $ git init 'ext::sh -c echo% pwned% >GIT-EXT-COMMAND-INJECTION% #'
-  Initialized empty Git repository in $TESTTMP/ext::sh -c echo% pwned% >GIT-EXT-COMMAND-INJECTION% #/.git/
+  $ git init -q 'ext::sh -c echo% pwned% >GIT-EXT-COMMAND-INJECTION% #'
   $ cd 'ext::sh -c echo% pwned% >GIT-EXT-COMMAND-INJECTION% #'
   $ git commit -q --allow-empty -m 'empty'
   $ cd ..
@@ -919,7 +915,7 @@ test for safely passing paths to git (CVE-2016-3105)
 
 Conversion of extra commit metadata to extras works
 
-  $ git init gitextras >/dev/null 2>/dev/null
+  $ git init -q gitextras >/dev/null 2>/dev/null
   $ cd gitextras
   $ touch foo
   $ git add foo

eden/scm/tests/test-fb-hgext-scm-prompt-git.t

@@ -35,8 +35,7 @@ Outside of a repo, should have no output
   $ _scm_prompt
 
 Set up repo
-  $ git init repo
-  Initialized empty Git repository in $TESTTMP/repo/.git/
+  $ git init -q repo
   $ cd repo
   $ _scm_prompt "%s\n"
   master

eden/scm/tests/test-hggit-clone.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha
@@ -69,8 +68,7 @@ Make sure that a deleted .hgsubstate does not confuse hg-git
   $ hg --cwd hgrepo-c status
 
 clone empty repo
-  $ git init empty
-  Initialized empty Git repository in $TESTTMP/empty/.git/
+  $ git init -q empty
   $ hg clone empty emptyhg
   updating to branch default
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved

eden/scm/tests/test-hggit-conflict-1.t

@@ -42,8 +42,7 @@ resolve using first parent
 
   $ cd ..
 
-  $ git init --bare gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/
+  $ git init -q --bare gitrepo
 
   $ cd hgrepo1
   $ hg bookmark -r tip master

eden/scm/tests/test-hggit-conflict-2.t

@@ -42,8 +42,7 @@ resolve using second parent
 
   $ cd ..
 
-  $ git init --bare gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/
+  $ git init -q --bare gitrepo
 
   $ cd hgrepo1
   $ hg bookmark -r tip master

eden/scm/tests/test-hggit-convergedmerge.t

@@ -42,8 +42,7 @@ Load commonly used test logic
 
   $ cd ..
 
-  $ git init --bare gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/
+  $ git init -q --bare gitrepo
 
   $ cd hgrepo1
   $ hg bookmark -r'desc(merge)' master

eden/scm/tests/test-hggit-empty-working-tree.t

@@ -1,15 +1,13 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ git commit --allow-empty -m empty
   [master (root-commit) 6782568] empty
 
   $ cd ..
-  $ git init --bare gitrepo2
-  Initialized empty Git repository in $TESTTMP/gitrepo2/
+  $ git init -q --bare gitrepo2
 
   $ hg clone gitrepo hgrepo | grep -v '^updating'
   importing git objects into hg

eden/scm/tests/test-hggit-encoding.t

@@ -4,8 +4,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
 
 utf-8 encoded commit message
@@ -24,8 +23,7 @@ The warning message changed in Git 1.8.0
   variable i18n.commitencoding to the encoding your project uses.
 
   $ cd ..
-  $ git init --bare gitrepo2
-  Initialized empty Git repository in $TESTTMP/gitrepo2/
+  $ git init -q --bare gitrepo2
 
   $ hg clone gitrepo hgrepo | grep -v '^updating'
   importing git objects into hg

eden/scm/tests/test-hggit-external-sync.t

@@ -5,8 +5,7 @@ Load commonly used test logic
 # Set up the git repo
 
   $ cd "$TESTTMP"
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo commit1 > commit1
   $ git add .

eden/scm/tests/test-hggit-file-removal.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha
@@ -95,8 +94,7 @@ final manifest in git is just beta
       add alpha
 
   $ cd ..
-  $ git init --bare gitrepo2
-  Initialized empty Git repository in $TESTTMP/gitrepo2/
+  $ git init -q --bare gitrepo2
 
   $ hg clone gitrepo hgrepo | grep -v '^updating'
   importing git objects into hg

eden/scm/tests/test-hggit-git-clone.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha

eden/scm/tests/test-hggit-hg-author.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha

eden/scm/tests/test-hggit-incoming.t

@@ -2,8 +2,7 @@ Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
   $ disable treemanifest
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha

eden/scm/tests/test-hggit-keywords.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha

eden/scm/tests/test-hggit-merge.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha
@@ -28,8 +27,7 @@ clean merge
    create mode 100644 beta
 
   $ cd ..
-  $ git init --bare gitrepo2
-  Initialized empty Git repository in $TESTTMP/gitrepo2/
+  $ git init -q --bare gitrepo2
 
   $ hg clone gitrepo hgrepo | grep -v '^updating'
   importing git objects into hg

eden/scm/tests/test-hggit-octopus.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha
@@ -59,8 +58,7 @@ Load commonly used test logic
    create mode 100644 zeta
 
   $ cd ..
-  $ git init --bare gitrepo2
-  Initialized empty Git repository in $TESTTMP/gitrepo2/
+  $ git init -q --bare gitrepo2
 
   $ hg clone gitrepo hgrepo | grep -v '^updating'
   importing git objects into hg

eden/scm/tests/test-hggit-outgoing.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha

eden/scm/tests/test-hggit-pull-after-strip.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha

eden/scm/tests/test-hggit-push.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo alpha > alpha
   $ git add alpha

eden/scm/tests/test-hggit-tree-decomposition.t

@@ -1,8 +1,7 @@
 Load commonly used test logic
   $ . "$TESTDIR/hggit/testutil"
 
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ mkdir d1
   $ echo a > d1/f1
@@ -21,8 +20,7 @@ Load commonly used test logic
 
 
   $ cd ..
-  $ git init --bare gitrepo2
-  Initialized empty Git repository in $TESTTMP/gitrepo2/
+  $ git init -q --bare gitrepo2
 
   $ hg clone gitrepo hgrepo | grep -v '^updating'
   importing git objects into hg

eden/scm/tests/test-hggit-verify-fail.t

@@ -3,8 +3,7 @@ inconsistencies. Since hg-git is ostensibly correct, we artificially create
 inconsistencies by placing different Mercurial and Git repos in the right spots.
 
   $ . "$TESTDIR/hggit/testutil"
-  $ git init gitrepo
-  Initialized empty Git repository in $TESTTMP/gitrepo/.git/
+  $ git init -q gitrepo
   $ cd gitrepo
   $ echo normalf > normalf
   $ echo missingf > missingf

eden/scm/tests/test-hgsql-hggit.t

@@ -4,8 +4,7 @@
   $ shorttraceback
   $ enable lz4revlog
 
-  $ git init a-git
-  Initialized empty Git repository in $TESTTMP/a-git/.git/
+  $ git init -q a-git
   $ cd a-git
 
 Make "a" compressable