Summary:
Now that we moved infinitepush to hgext in D6691670, we can also move
the tests.
Test Plan: Ran all the tests.
Reviewers: stash, #mercurial, #sourcecontrol
Reviewed By: stash
Differential Revision: https://phabricator.intern.facebook.com/D6691848
Signature: 6691848:1515573470:628d092f14cf3ae21c036883243c80eb3b01aa72