Load applications from api.

cerberus/src/app/core/services/application.service.ts

@@ -11,6 +11,10 @@ export class ApplicationService {
     private _httpClient: HttpClient
   ) {}
 
+  getAll(): Promise<Application[]> {
+    return this._httpClient.get<Application[]>('/api/applications').toPromise();
+  }
+
   add(application: Application): Promise<Application> {
     return this._httpClient.post<Application>('/api/applications', application).toPromise();
   }