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/kubelet/config/file_linux.go

@@ -26,8 +26,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/golang/glog"
 	"golang.org/x/exp/inotify"
+	"k8s.io/klog"
 
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/util/wait"
@@ -58,7 +58,7 @@ func (s *sourceFile) startWatch() {
 		}
 
 		if err := s.doWatch(); err != nil {
-			glog.Errorf("Unable to read config path %q: %v", s.path, err)
+			klog.Errorf("Unable to read config path %q: %v", s.path, err)
 			if _, retryable := err.(*retryableError); !retryable {
 				backOff.Next(backOffId, time.Now())
 			}
@@ -103,13 +103,13 @@ func (s *sourceFile) doWatch() error {
 func (s *sourceFile) produceWatchEvent(e *inotify.Event) error {
 	// Ignore file start with dots
 	if strings.HasPrefix(filepath.Base(e.Name), ".") {
-		glog.V(4).Infof("Ignored pod manifest: %s, because it starts with dots", e.Name)
+		klog.V(4).Infof("Ignored pod manifest: %s, because it starts with dots", e.Name)
 		return nil
 	}
 	var eventType podEventType
 	switch {
 	case (e.Mask & inotify.IN_ISDIR) > 0:
-		glog.Errorf("Not recursing into manifest path %q", s.path)
+		klog.Errorf("Not recursing into manifest path %q", s.path)
 		return nil
 	case (e.Mask & inotify.IN_CREATE) > 0:
 		eventType = podAdd