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/cloudprovider/providers/cloudstack/metadata.go

@@ -25,10 +25,10 @@ import (
 	"net/http"
 
 	"github.com/d2g/dhcp4"
-	"github.com/golang/glog"
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/types"
 	cloudprovider "k8s.io/cloud-provider"
+	"k8s.io/klog"
 )
 
 type metadata struct {
@@ -143,7 +143,7 @@ func (m *metadata) GetZone(ctx context.Context) (cloudprovider.Zone, error) {
 		m.zone = zoneName
 	}
 
-	glog.V(2).Infof("Current zone is %v", zone)
+	klog.V(2).Infof("Current zone is %v", zone)
 	zone.FailureDomain = m.zone
 	zone.Region = m.zone