AMBARI-16762. Uncaught error in Ambari Web (alexantonenko)

ambari-web/app/controllers/installer.js

@@ -442,9 +442,8 @@ App.InstallerController = App.WizardController.extend({
     App.db.setStacks(stacks.slice());
     this.set('content.stacks', stacks);
 
-    App.OperatingSystem.find().filterProperty('isSelected', false).map(function (os) {
-      os.deleteRecord();
-      App.store.commit();
+    App.OperatingSystem.find().filterProperty('isSelected', false).forEach(function (os) {
+      App.serviceMapper.deleteRecord(os);
     });
     var repos = App.Repository.find() || [];
     App.db.setRepos(repos.slice());