Fix up ember test files

ghost/admin/tests/.jshintrc

@@ -21,8 +21,10 @@
     "andThen",
     "currentURL",
     "currentPath",
-    "currentRouteName"
+    "currentRouteName",
+    "expect"
   ],
+  "mocha": true,
   "node": false,
   "browser": false,
   "boss": true,
@@ -31,6 +33,7 @@
   "devel": false,
   "eqeqeq": true,
   "evil": true,
+  "expr": true,
   "forin": false,
   "immed": false,
   "laxbreak": false,

ghost/admin/tests/unit/components/gh-trim-focus-input_test.js

@@ -1,4 +1,4 @@
-/* jshint expr:true */
+import Ember from 'ember';
 import {
     describeComponent,
     it

ghost/admin/tests/unit/components/gh-url-preview_test.js

@@ -1,4 +1,3 @@
-/* jshint expr:true */
 import {
     describeComponent,
     it

ghost/admin/tests/unit/controllers/post-settings-menu_test.js

@@ -1,4 +1,4 @@
-/* jshint expr:true */
+import Ember from 'ember';
 import {
     describeModule,
     it

ghost/admin/tests/unit/controllers/settings-general_test.js

@@ -1,4 +1,4 @@
-/* jshint expr:true */
+import Ember from 'ember';
 import {
     describeModule,
     it

ghost/admin/tests/unit/models/post_test.js

@@ -1,4 +1,4 @@
-/* jshint expr:true */
+import Ember from 'ember';
 import {
     describeModel,
     it

ghost/admin/tests/unit/models/role_test.js

@@ -1,3 +1,4 @@
+import Ember from 'ember';
 import {
     describeModel,
     it

ghost/admin/tests/unit/models/user_test.js

@@ -1,4 +1,4 @@
-/*jshint expr:true */
+import Ember from 'ember';
 import {
     describeModel,
     it

ghost/admin/tests/unit/utils/ghost-paths_test.js

@@ -1,5 +1,3 @@
-/* jshint expr:true */
-
 import ghostPaths from 'ghost/utils/ghost-paths';
 
 describe('ghost-paths', function () {