AMBARI-3768. Add Service Wizard (Install, Start and Test): Clicking on close(x) button doesn't close wizard immediately. (onechiporenko)

ambari-web/app/routes/add_service_routes.js

@@ -42,6 +42,7 @@ module.exports = Em.Route.extend({
             App.router.transitionTo('main.services.index');
           },
           onClose: function() {
+            this.set('showCloseButton', false); // prevent user to click "Close" many times
             App.router.get('updateController').set('isWorking', true);
             var self = this;
             App.router.get('updateController').updateServiceMetric(function(){