Move from glog to klog

- Move from the old github.com/golang/glog to k8s.io/klog
- klog as explicit InitFlags() so we add them as necessary
- we update the other repositories that we vendor that made a similar
change from glog to klog
  * github.com/kubernetes/repo-infra
  * k8s.io/gengo/
  * k8s.io/kube-openapi/
  * github.com/google/cadvisor
- Entirely remove all references to glog
- Fix some tests by explicit InitFlags in their init() methods

Change-Id: I92db545ff36fcec83afe98f550c9e630098b3135

test/integration/master/kms_plugin_mock.go

@@ -26,8 +26,8 @@ import (
 
 	"google.golang.org/grpc"
 
-	"github.com/golang/glog"
 	kmsapi "k8s.io/apiserver/pkg/storage/value/encrypt/envelope/v1beta1"
+	"k8s.io/klog"
 )
 
 const (
@@ -51,7 +51,7 @@ func NewBase64Plugin() (*base64Plugin, error) {
 	if err != nil {
 		return nil, fmt.Errorf("failed to listen on the unix socket, error: %v", err)
 	}
-	glog.Infof("Listening on %s", sockFile)
+	klog.Infof("Listening on %s", sockFile)
 
 	server := grpc.NewServer()
 
@@ -78,7 +78,7 @@ func (s *base64Plugin) Version(ctx context.Context, request *kmsapi.VersionReque
 }
 
 func (s *base64Plugin) Decrypt(ctx context.Context, request *kmsapi.DecryptRequest) (*kmsapi.DecryptResponse, error) {
-	glog.Infof("Received Decrypt Request for DEK: %s", string(request.Cipher))
+	klog.Infof("Received Decrypt Request for DEK: %s", string(request.Cipher))
 
 	buf := make([]byte, base64.StdEncoding.DecodedLen(len(request.Cipher)))
 	n, err := base64.StdEncoding.Decode(buf, request.Cipher)
@@ -90,7 +90,7 @@ func (s *base64Plugin) Decrypt(ctx context.Context, request *kmsapi.DecryptReque
 }
 
 func (s *base64Plugin) Encrypt(ctx context.Context, request *kmsapi.EncryptRequest) (*kmsapi.EncryptResponse, error) {
-	glog.Infof("Received Encrypt Request for DEK: %x", request.Plain)
+	klog.Infof("Received Encrypt Request for DEK: %x", request.Plain)
 	s.encryptRequest <- request
 
 	buf := make([]byte, base64.StdEncoding.EncodedLen(len(request.Plain)))