fix SSR injection context issue with Angulartics

src/app/app.component.spec.ts

@@ -15,7 +15,7 @@ import { MetadataService } from './core/metadata/metadata.service';
 import { NativeWindowRef, NativeWindowService } from './core/services/window.service';
 import { TranslateLoaderMock } from './shared/mocks/translate-loader.mock';
 import { MetadataServiceMock } from './shared/mocks/metadata-service.mock';
-import { AngularticsMock } from './shared/mocks/angulartics.service.mock';
+import { AngularticsProviderMock } from './shared/mocks/angulartics-provider.service.mock';
 import { AuthServiceMock } from './shared/mocks/auth.service.mock';
 import { AuthService } from './core/auth/auth.service';
 import { MenuService } from './shared/menu/menu.service';
@@ -65,8 +65,8 @@ describe('App component', () => {
       providers: [
         { provide: NativeWindowService, useValue: new NativeWindowRef() },
         { provide: MetadataService, useValue: new MetadataServiceMock() },
-        { provide: Angulartics2GoogleAnalytics, useValue: new AngularticsMock() },
-        { provide: Angulartics2DSpace, useValue: new AngularticsMock() },
+        { provide: Angulartics2GoogleAnalytics, useValue: new AngularticsProviderMock() },
+        { provide: Angulartics2DSpace, useValue: new AngularticsProviderMock() },
         { provide: AuthService, useValue: new AuthServiceMock() },
         { provide: Router, useValue: new RouterMock() },
         { provide: ActivatedRoute, useValue: new MockActivatedRoute() },

src/app/shared/mocks/angulartics-provider.service.mock.ts

@@ -2,7 +2,7 @@ import { Injectable } from '@angular/core';
 
 /* tslint:disable:no-empty */
 @Injectable()
-export class AngularticsMock {
+export class AngularticsProviderMock {
   public eventTrack(action, properties) { }
   public startTracking(): void {}
 }

src/app/shared/mocks/angulartics2.service.mock.ts

@@ -0,0 +1,9 @@
+import { Injectable } from '@angular/core';
+
+/* tslint:disable:no-empty */
+@Injectable()
+export class Angulartics2Mock {
+  public eventTrack = {
+    next: (param: any): void => {}
+  };
+}

src/modules/app/server-app.module.ts

@@ -19,17 +19,18 @@ import { AuthService } from '../../app/core/auth/auth.service';
 import { ServerAuthService } from '../../app/core/auth/server-auth.service';
 
 import { Angulartics2GoogleAnalytics } from 'angulartics2/ga';
-import { AngularticsMock } from '../../app/shared/mocks/angulartics.service.mock';
+import { AngularticsProviderMock } from '../../app/shared/mocks/angulartics-provider.service.mock';
 import { SubmissionService } from '../../app/submission/submission.service';
 import { ServerSubmissionService } from '../../app/submission/server-submission.service';
 import { Angulartics2DSpace } from '../../app/statistics/angulartics/dspace-provider';
-import { Angulartics2RouterlessModule } from 'angulartics2/routerlessmodule';
 import { ServerLocaleService } from '../../app/core/locale/server-locale.service';
 import { LocaleService } from '../../app/core/locale/locale.service';
 import { HTTP_INTERCEPTORS } from '@angular/common/http';
 import { ForwardClientIpInterceptor } from '../../app/core/forward-client-ip/forward-client-ip.interceptor';
 import { HardRedirectService } from '../../app/core/services/hard-redirect.service';
 import { ServerHardRedirectService } from '../../app/core/services/server-hard-redirect.service';
+import { Angulartics2 } from 'angulartics2';
+import { Angulartics2Mock } from '../../app/shared/mocks/angulartics2.service.mock';
 
 export function createTranslateLoader() {
   return new TranslateJson5UniversalLoader('dist/server/assets/i18n/', '.json5');
@@ -53,18 +54,21 @@ export function createTranslateLoader() {
         deps: []
       }
     }),
-    Angulartics2RouterlessModule.forRoot(),
     ServerModule,
     AppModule
   ],
   providers: [
+    {
+      provide: Angulartics2,
+      useClass: Angulartics2Mock
+    },
     {
       provide: Angulartics2GoogleAnalytics,
-      useClass: AngularticsMock
+      useClass: AngularticsProviderMock
     },
     {
       provide: Angulartics2DSpace,
-      useClass: AngularticsMock
+      useClass: AngularticsProviderMock
     },
     {
       provide: AuthService,