AMBARI-8029. Components dropdown on "Select Configuration Group Hosts" empty for KNOX. (jaimin)

ambari-server/src/main/resources/stacks/HDP/2.2/services/KNOX/metainfo.xml

@@ -26,6 +26,7 @@
       <components>
         <component>
           <name>KNOX_GATEWAY</name>
+          <displayName>Knox Gateway</displayName>
           <category>MASTER</category>
           <cardinality>1+</cardinality>
           <commandScript>

ambari-web/app/controllers/main/service/manage_config_groups_controller.js

@@ -385,8 +385,8 @@ App.ManageConfigGroupsController = Em.Controller.extend({
   componentsForFilter: function () {
     return App.StackServiceComponent.find().filterProperty('serviceName', this.get('serviceName')).map(function (component) {
       return Em.Object.create({
-        displayName: component.get('displayName'),
         componentName: component.get('componentName'),
+        displayName: App.format.role(component.get('componentName')),
         selected: false
       });
     });