change rbac roleref type

pkg/apis/rbac/helpers.go

@@ -0,0 +1,25 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rbac
+
+import (
+	"k8s.io/kubernetes/pkg/api/unversioned"
+)
+
+func RoleRefGroupKind(roleRef RoleRef) unversioned.GroupKind {
+	return unversioned.GroupKind{Group: roleRef.APIGroup, Kind: roleRef.Kind}
+}