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/volume/pvprotection/pv_protection_controller_test.go

@@ -23,7 +23,7 @@ import (
 	"time"
 
 	"github.com/davecgh/go-spew/spew"
-	"github.com/golang/glog"
+	"k8s.io/klog"
 
 	"k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
@@ -246,7 +246,7 @@ func TestPVProtectionController(t *testing.T) {
 				break
 			}
 			if ctrl.queue.Len() > 0 {
-				glog.V(5).Infof("Test %q: %d events queue, processing one", test.name, ctrl.queue.Len())
+				klog.V(5).Infof("Test %q: %d events queue, processing one", test.name, ctrl.queue.Len())
 				ctrl.processNextWorkItem()
 			}
 			if ctrl.queue.Len() > 0 {
@@ -257,7 +257,7 @@ func TestPVProtectionController(t *testing.T) {
 			if currentActionCount < len(test.expectedActions) {
 				// Do not log evey wait, only when the action count changes.
 				if lastReportedActionCount < currentActionCount {
-					glog.V(5).Infof("Test %q: got %d actions out of %d, waiting for the rest", test.name, currentActionCount, len(test.expectedActions))
+					klog.V(5).Infof("Test %q: got %d actions out of %d, waiting for the rest", test.name, currentActionCount, len(test.expectedActions))
 					lastReportedActionCount = currentActionCount
 				}
 				// The test expected more to happen, wait for the actions.