Remove list of features if license is updated

by removing the list of license-enabled-features when the user upgrades their license, it triggers the features.service.js to retrieve a new list of features from the config endpoint.

awx/ui/static/js/helpers/License.js

@@ -173,6 +173,7 @@ export default
                                 // ignore
                             }
                             Alert('License Accepted', 'The Ansible Tower license was updated. To view or update license information in the future choose View License from the Account menu.','alert-info');
+                            $rootScope.features = undefined;
                             $location.path('/home');
                         })
                         .error(function (data, status) {