improve IAM module

Signed-off-by: hongming <talonwan@yunify.com>

vendor/k8s.io/apiserver/pkg/registry/generic/OWNERS

@@ -23,12 +23,8 @@ reviewers:
 - dims
 - hongchaodeng
 - krousey
-- markturansky
-- fgrzadkowski
 - xiang90
 - resouer
 - mqliang
-- feihujiang
 - sdminonne
-- goltermann
 - enj

vendor/k8s.io/apiserver/pkg/registry/generic/registry/dryrun.go

@@ -90,6 +90,9 @@ func (s *DryRunnableStorage) GuaranteedUpdate(
 			return err
 		}
 		rev, err := s.Versioner().ObjectResourceVersion(ptrToType)
+		if err != nil {
+			return err
+		}
 		out, _, err := tryUpdate(ptrToType, storage.ResponseMeta{ResourceVersion: rev})
 		if err != nil {
 			return err