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

Kubernetes-commit: 954996e231074dc7429f7be1256a579bedd8344c

tools/watch/until.go

@@ -22,13 +22,13 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/golang/glog"
 	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/apimachinery/pkg/watch"
 	"k8s.io/client-go/tools/cache"
+	"k8s.io/klog"
 )
 
 // PreconditionFunc returns true if the condition has been reached, false if it has not been reached yet,
@@ -135,7 +135,7 @@ func UntilWithSync(ctx context.Context, lw cache.ListerWatcher, objType runtime.
 func ContextWithOptionalTimeout(parent context.Context, timeout time.Duration) (context.Context, context.CancelFunc) {
 	if timeout < 0 {
 		// This should be handled in validation
-		glog.Errorf("Timeout for context shall not be negative!")
+		klog.Errorf("Timeout for context shall not be negative!")
 		timeout = 0
 	}