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/cadvisor/BUILD

@@ -31,13 +31,13 @@ go_library(
         "//vendor/github.com/google/cadvisor/info/v2:go_default_library",
     ] + select({
         "@io_bazel_rules_go//go/platform:linux": [
-            "//vendor/github.com/golang/glog:go_default_library",
             "//vendor/github.com/google/cadvisor/cache/memory:go_default_library",
             "//vendor/github.com/google/cadvisor/container:go_default_library",
             "//vendor/github.com/google/cadvisor/fs:go_default_library",
             "//vendor/github.com/google/cadvisor/manager:go_default_library",
             "//vendor/github.com/google/cadvisor/metrics:go_default_library",
             "//vendor/github.com/google/cadvisor/utils/sysfs:go_default_library",
+            "//vendor/k8s.io/klog:go_default_library",
         ],
         "@io_bazel_rules_go//go/platform:windows": [
             "//pkg/kubelet/winstats:go_default_library",

pkg/kubelet/cadvisor/cadvisor_linux.go

@@ -26,7 +26,6 @@ import (
 	"path"
 	"time"
 
-	"github.com/golang/glog"
 	"github.com/google/cadvisor/cache/memory"
 	cadvisormetrics "github.com/google/cadvisor/container"
 	"github.com/google/cadvisor/events"
@@ -35,6 +34,7 @@ import (
 	"github.com/google/cadvisor/manager"
 	"github.com/google/cadvisor/metrics"
 	"github.com/google/cadvisor/utils/sysfs"
+	"k8s.io/klog"
 	"k8s.io/kubernetes/pkg/kubelet/types"
 )
 
@@ -67,7 +67,7 @@ func init() {
 			f.DefValue = defaultValue
 			f.Value.Set(defaultValue)
 		} else {
-			glog.Errorf("Expected cAdvisor flag %q not found", name)
+			klog.Errorf("Expected cAdvisor flag %q not found", name)
 		}
 	}
 }
@@ -199,7 +199,7 @@ func (cc *cadvisorClient) getFsInfo(label string) (cadvisorapiv2.FsInfo, error)
 	}
 	// TODO(vmarmol): Handle this better when a label has more than one image filesystem.
 	if len(res) > 1 {
-		glog.Warningf("More than one filesystem labeled %q: %#v. Only using the first one", label, res)
+		klog.Warningf("More than one filesystem labeled %q: %#v. Only using the first one", label, res)
 	}
 
 	return res[0], nil