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

plugin/pkg/auth/authorizer/rbac/rbac.go

@@ -21,7 +21,7 @@ import (
 	"bytes"
 	"fmt"
 
-	"github.com/golang/glog"
+	"k8s.io/klog"
 
 	rbacv1 "k8s.io/api/rbac/v1"
 	"k8s.io/apimachinery/pkg/labels"
@@ -81,7 +81,7 @@ func (r *RBACAuthorizer) Authorize(requestAttributes authorizer.Attributes) (aut
 
 	// Build a detailed log of the denial.
 	// Make the whole block conditional so we don't do a lot of string-building we won't use.
-	if glog.V(5) {
+	if klog.V(5) {
 		var operation string
 		if requestAttributes.IsResourceRequest() {
 			b := &bytes.Buffer{}
@@ -115,7 +115,7 @@ func (r *RBACAuthorizer) Authorize(requestAttributes authorizer.Attributes) (aut
 			scope = "cluster-wide"
 		}
 
-		glog.Infof("RBAC DENY: user %q groups %q cannot %s %s", requestAttributes.GetUser().GetName(), requestAttributes.GetUser().GetGroups(), operation, scope)
+		klog.Infof("RBAC DENY: user %q groups %q cannot %s %s", requestAttributes.GetUser().GetName(), requestAttributes.GetUser().GetGroups(), operation, scope)
 	}
 
 	reason := ""