Report events to apiserver in local volume plugin.

- Add VolumeHost.GetEventRecorder() method
- Add related e2e tests

pkg/volume/testing/BUILD

@@ -28,6 +28,7 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/uuid:go_default_library",
         "//vendor/k8s.io/client-go/kubernetes:go_default_library",
+        "//vendor/k8s.io/client-go/tools/record:go_default_library",
         "//vendor/k8s.io/client-go/util/testing:go_default_library",
     ],
 )

pkg/volume/testing/testing.go

@@ -33,6 +33,7 @@ import (
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/uuid"
 	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/record"
 	utiltesting "k8s.io/client-go/util/testing"
 	"k8s.io/kubernetes/pkg/cloudprovider"
 	"k8s.io/kubernetes/pkg/util/io"
@@ -189,6 +190,10 @@ func (f *fakeVolumeHost) GetNodeName() types.NodeName {
 	return types.NodeName(f.nodeName)
 }
 
+func (f *fakeVolumeHost) GetEventRecorder() record.EventRecorder {
+	return nil
+}
+
 func ProbeVolumePlugins(config VolumeConfig) []VolumePlugin {
 	if _, ok := config.OtherAttributes["fake-property"]; ok {
 		return []VolumePlugin{