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/server/auth.go

@@ -20,11 +20,11 @@ import (
 	"net/http"
 	"strings"
 
-	"github.com/golang/glog"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apiserver/pkg/authentication/authenticator"
 	"k8s.io/apiserver/pkg/authentication/user"
 	"k8s.io/apiserver/pkg/authorization/authorizer"
+	"k8s.io/klog"
 )
 
 // KubeletAuth implements AuthInterface
@@ -108,7 +108,7 @@ func (n nodeAuthorizerAttributesGetter) GetRequestAttributes(u user.Info, r *htt
 		attrs.Subresource = "spec"
 	}
 
-	glog.V(5).Infof("Node request attributes: user=%#v attrs=%#v", attrs.GetUser(), attrs)
+	klog.V(5).Infof("Node request attributes: user=%#v attrs=%#v", attrs.GetUser(), attrs)
 
 	return attrs
 }