Upgrade to Angular 7 for GUI2

Change-Id: I5085bacb347ffc9af78cf7d3408853f76a5812a0
diff --git a/web/gui2-fw-lib/projects/gui2-fw-lib/src/lib/layer/loading.service.spec.ts b/web/gui2-fw-lib/projects/gui2-fw-lib/src/lib/layer/loading.service.spec.ts
index 404439f..fc990eb 100644
--- a/web/gui2-fw-lib/projects/gui2-fw-lib/src/lib/layer/loading.service.spec.ts
+++ b/web/gui2-fw-lib/projects/gui2-fw-lib/src/lib/layer/loading.service.spec.ts
@@ -29,23 +29,30 @@
 
 class MockThemeService {}
 
-class MockWebSocketService {}
-
 /**
  * ONOS GUI -- Layer -- Loading Service - Unit Tests
  */
 describe('LoadingService', () => {
     let log: LogService;
+    let mockWindow: Window;
 
     beforeEach(() => {
         log = new ConsoleLoggerService();
 
+        mockWindow = <any>{
+            innerWidth: 400,
+            innerHeight: 200,
+            navigator: {
+                userAgent: 'defaultUA'
+            }
+        };
+
         TestBed.configureTestingModule({
             providers: [LoadingService,
                 { provide: LogService, useValue: log },
                 { provide: FnService, useClass: MockFnService },
                 { provide: ThemeService, useClass: MockThemeService },
-                { provide: WebSocketService, useClass: MockWebSocketService },
+                { provide: 'Window', useFactory: (() => mockWindow ) }
             ]
         });
     });