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/controller/garbagecollector/operations.go

@@ -19,7 +19,7 @@ package garbagecollector
 import (
 	"fmt"
 
-	"github.com/golang/glog"
+	"k8s.io/klog"
 
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/api/meta"
@@ -110,7 +110,7 @@ func (gc *GarbageCollector) removeFinalizer(owner *node, targetFinalizer string)
 			newFinalizers = append(newFinalizers, f)
 		}
 		if !found {
-			glog.V(5).Infof("the %s finalizer is already removed from object %s", targetFinalizer, owner.identity)
+			klog.V(5).Infof("the %s finalizer is already removed from object %s", targetFinalizer, owner.identity)
 			return nil
 		}
 		// remove the owner from dependent's OwnerReferences