Update api.service.ts

Removed the 'a' appended with the InstanceId.

Author: ishwaryamamidi

client/src/app/api/api/api.service.ts

@@ -232,7 +232,7 @@ export class ApiService {
     if (idInstance === null || idInstance === undefined) {
       throw new Error('Required ID Instance parameter');
     } else {
-      queryParam = queryParam.set('instanceID', <any>('a' + idInstance));
+      queryParam = queryParam.set('instanceID', <any>idInstance);
     }
 
     return this.commonConf(endpoint, queryParam, observe, reportProgress);