AMBARI-6084 HA wrong counter of hosts without masters. (ababiichuk)

ambari-web/app/controllers/main/admin/highAvailability/step2_controller.js

@@ -29,6 +29,12 @@ App.HighAvailabilityWizardStep2Controller = App.WizardStep5Controller.extend({
    */
   multipleComponents: ['NAMENODE', 'JOURNALNODE'],
 
+  /**
+   * overrides method in wizardStep5Controller
+   * it must be empty as it shouldn't be run
+   */
+  masterHostMappingObserver: function() {},
+
   /**
    * Load services info to appropriate variable and return masterComponentHosts
    * @return Array