[Library | Trunk]: Make utils service injectable root

git-svn-id: https://svn.driver.research-infrastructures.eu/driver/dnet40/modules/uoa-services-library/trunk/ng-openaire-library/src/app@59486 d315682c-612b-4755-9ff5-7f18f6832af3

services/utilities.service.ts

@@ -3,7 +3,9 @@ import {Observable} from 'rxjs/Observable';
 import {CustomOptions} from './servicesUtils/customOptions.class';
 import {HttpClient} from '@angular/common/http';
 
-@Injectable()
+@Injectable({
+    providedIn: "root"
+})
 export class UtilitiesService {
     constructor(private http: HttpClient) {
     }