AMBARI-12239. If repeatedly do not navigate at flume service page ,Flume agent status will never change at UI (akovalenko)

ambari-web/app/controllers/global/update_controller.js

@@ -461,6 +461,8 @@ App.UpdateController = Em.Controller.extend({
           requestsRunningStatus["updateServiceMetric"] = false;
         }
       });
+    } else {
+      callback();
     }
   },
   /**