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/dockershim/docker_image_windows.go

@@ -22,7 +22,7 @@ import (
 	"context"
 	"time"
 
-	"github.com/golang/glog"
+	"k8s.io/klog"
 
 	runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
 	"k8s.io/kubernetes/pkg/kubelet/winstats"
@@ -32,14 +32,14 @@ import (
 func (ds *dockerService) ImageFsInfo(_ context.Context, _ *runtimeapi.ImageFsInfoRequest) (*runtimeapi.ImageFsInfoResponse, error) {
 	info, err := ds.client.Info()
 	if err != nil {
-		glog.Errorf("Failed to get docker info: %v", err)
+		klog.Errorf("Failed to get docker info: %v", err)
 		return nil, err
 	}
 
 	statsClient := &winstats.StatsClient{}
 	fsinfo, err := statsClient.GetDirFsInfo(info.DockerRootDir)
 	if err != nil {
-		glog.Errorf("Failed to get dir fsInfo for %q: %v", info.DockerRootDir, err)
+		klog.Errorf("Failed to get dir fsInfo for %q: %v", info.DockerRootDir, err)
 		return nil, err
 	}