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/set/set_selector.go

@@ -19,8 +19,8 @@ package set
 import (
 	"fmt"
 
-	"github.com/golang/glog"
 	"github.com/spf13/cobra"
+	"k8s.io/klog"
 
 	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -171,7 +171,7 @@ func (o *SetSelectorOptions) RunSelector() error {
 
 			// record this change (for rollout history)
 			if err := o.Recorder.Record(patch.Info.Object); err != nil {
-				glog.V(4).Infof("error recording current command: %v", err)
+				klog.V(4).Infof("error recording current command: %v", err)
 			}
 
 			return runtime.Encode(scheme.DefaultJSONEncoder(), info.Object)