fixed failing UI test

src/test/javascript/spec/app/entities/likes/likes.service.spec.ts

@@ -24,7 +24,7 @@ describe('Service Tests', () => {
       httpMock = injector.get(HttpTestingController);
       currentDate = moment();
 
-      elemDefault = new Likes(0, currentDate, 0, 0);
+      elemDefault = new Likes(0, currentDate, 0, '0');
     });
 
     describe('Service methods', () => {