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/kubelet_network.go

@@ -19,8 +19,8 @@ package kubelet
 import (
 	"fmt"
 
-	"github.com/golang/glog"
 	"k8s.io/api/core/v1"
+	"k8s.io/klog"
 	runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
 	utiliptables "k8s.io/kubernetes/pkg/util/iptables"
 )
@@ -74,7 +74,7 @@ func (kl *Kubelet) updatePodCIDR(cidr string) (bool, error) {
 		return true, fmt.Errorf("failed to update pod CIDR: %v", err)
 	}
 
-	glog.Infof("Setting Pod CIDR: %v -> %v", podCIDR, cidr)
+	klog.Infof("Setting Pod CIDR: %v -> %v", podCIDR, cidr)
 	kl.runtimeState.setPodCIDR(cidr)
 	return true, nil
 }