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

pkg/kubectl/cmd/annotate/annotate.go

@@ -22,8 +22,8 @@ import (
 	"io"
 
 	jsonpatch "github.com/evanphx/json-patch"
-	"github.com/golang/glog"
 	"github.com/spf13/cobra"
+	"k8s.io/klog"
 
 	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -271,7 +271,7 @@ func (o AnnotateOptions) RunAnnotate() error {
 				return err
 			}
 			if err := o.Recorder.Record(info.Object); err != nil {
-				glog.V(4).Infof("error recording current command: %v", err)
+				klog.V(4).Infof("error recording current command: %v", err)
 			}
 			if err := o.updateAnnotations(obj); err != nil {
 				return err
@@ -283,7 +283,7 @@ func (o AnnotateOptions) RunAnnotate() error {
 			patchBytes, err := jsonpatch.CreateMergePatch(oldData, newData)
 			createdPatch := err == nil
 			if err != nil {
-				glog.V(2).Infof("couldn't compute patch: %v", err)
+				klog.V(2).Infof("couldn't compute patch: %v", err)
 			}
 
 			mapping := info.ResourceMapping()