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

plugin/pkg/client/auth/oidc/oidc.go

@@ -28,10 +28,10 @@ import (
 	"sync"
 	"time"
 
-	"github.com/golang/glog"
 	"golang.org/x/oauth2"
 	"k8s.io/apimachinery/pkg/util/net"
 	restclient "k8s.io/client-go/rest"
+	"k8s.io/klog"
 )
 
 const (
@@ -49,7 +49,7 @@ const (
 
 func init() {
 	if err := restclient.RegisterAuthProviderPlugin("oidc", newOIDCAuthProvider); err != nil {
-		glog.Fatalf("Failed to register oidc auth plugin: %v", err)
+		klog.Fatalf("Failed to register oidc auth plugin: %v", err)
 	}
 }
 
@@ -124,7 +124,7 @@ func newOIDCAuthProvider(_ string, cfg map[string]string, persister restclient.A
 	}
 
 	if len(cfg[cfgExtraScopes]) > 0 {
-		glog.V(2).Infof("%s auth provider field depricated, refresh request don't send scopes",
+		klog.V(2).Infof("%s auth provider field depricated, refresh request don't send scopes",
 			cfgExtraScopes)
 	}