unit test cleanup (#454)

* auth mock

* avoid using jasmine

* cleanup preview tests

* cleanup recent files tests

* cleanup shared files tests

* remove fdescribe

* update tests

* move adf services to single place

* move app specific services to single place

* cleanup directive tests

* cleanup directive tests

* update directive tests

src/app/components/header/header.component.spec.ts

@@ -41,16 +41,10 @@ describe('HeaderComponent', () => {
 
     beforeEach(() => {
         TestBed.configureTestingModule({
-            imports: [
-                AppTestingModule
-            ],
+            imports: [ AppTestingModule ],
             declarations: [
                 HeaderComponent
             ],
-            providers: [
-                AppConfigService,
-                PeopleContentService
-            ],
             schemas: [ NO_ERRORS_SCHEMA ]
         })
         .overrideProvider(PeopleContentService, {