Moved modelHelpers service in the DataSources module

Change-Id: Ife4239d8f0ca0ec12ed7db17c337deb6e06e80fe
diff --git a/src/app/datasources/stores/model.store.spec.ts b/src/app/datasources/stores/model.store.spec.ts
index a6edcb9..49b9338 100644
--- a/src/app/datasources/stores/model.store.spec.ts
+++ b/src/app/datasources/stores/model.store.spec.ts
@@ -7,7 +7,7 @@
 import {StoreHelpers} from '../helpers/store.helpers';
 import {ModelRest} from '../rest/model.rest';
 import {AppConfig} from '../../config/app.config';
-import {ModelHelpers} from '../../core/services/helpers/model.helper';
+import {ModelHelpers} from '../helpers/model.helpers';
 
 let service: IModelStoreService;
 let httpBackend: ng.IHttpBackendService;