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

cmd/kubelet/app/server_linux.go

@@ -17,26 +17,26 @@ limitations under the License.
 package app
 
 import (
-	"github.com/golang/glog"
 	"golang.org/x/exp/inotify"
+	"k8s.io/klog"
 )
 
 func watchForLockfileContention(path string, done chan struct{}) error {
 	watcher, err := inotify.NewWatcher()
 	if err != nil {
-		glog.Errorf("unable to create watcher for lockfile: %v", err)
+		klog.Errorf("unable to create watcher for lockfile: %v", err)
 		return err
 	}
 	if err = watcher.AddWatch(path, inotify.IN_OPEN|inotify.IN_DELETE_SELF); err != nil {
-		glog.Errorf("unable to watch lockfile: %v", err)
+		klog.Errorf("unable to watch lockfile: %v", err)
 		return err
 	}
 	go func() {
 		select {
 		case ev := <-watcher.Event:
-			glog.Infof("inotify event: %v", ev)
+			klog.Infof("inotify event: %v", ev)
 		case err = <-watcher.Error:
-			glog.Errorf("inotify watcher error: %v", err)
+			klog.Errorf("inotify watcher error: %v", err)
 		}
 		close(done)
 	}()