Add cinder volume examples

I can not find cinder examples,add in packages examples/volume and examples/persistent-volume-provisioning

examples/persistent-volume-provisioning/cinder/cinder-storage-class.yaml

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+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: gold
+provisioner: kubernetes.io/cinder
+parameters:
+  type: fast
+  availability: nova

examples/persistent-volume-provisioning/cinder/example-pod.yaml

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+apiVersion: v1
+kind: ReplicationController
+metadata:
+  name: server
+spec:
+  replicas: 1
+  selector:
+    role: server
+  template:
+    metadata:
+      labels:
+        role: server
+    spec:
+      containers:
+      - name: server
+        image: nginx
+        volumeMounts:
+          - mountPath: /var/lib/www/html
+            name: cinderpvc
+      volumes:
+        - name: cinderpvc
+          persistentVolumeClaim:
+            claimName: claim1

examples/volumes/cinder/README.md

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+This is a simple web server pod which serves HTML from an Cinder volume.
+
+Create a volume in the same tenant and zone as your node.
+
+Add your volume information in the pod description file cinder-web.yaml then create the pod:
+
+```shell
+  $ kubectl create -f examples/volumes/cinder/cinder-web.yaml
+```
+
+Add some data to the volume if is empty:
+
+```sh
+  $ echo  "Hello World" >& /var/lib/kubelet/plugins/kubernetes.io/cinder/mounts/{Volume ID}/index.html
+```
+
+You should now be able to query your web server:
+
+```sh
+  $ curl <Pod IP address>
+  $ Hello World
+```
+
+
+<!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
+[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/examples/volumes/cinder/README.md?pixel)]()
+<!-- END MUNGE: GENERATED_ANALYTICS -->

examples/volumes/cinder/cinder-web.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: cinder-web
+spec:
+  containers:
+    - name: web
+      image: nginx
+      ports:
+        - name: web
+          containerPort: 80
+          protocol: tcp
+      volumeMounts:
+        - name: html-volume
+          mountPath: "/usr/share/nginx/html"
+  volumes:
+    - name: html-volume
+      cinder:
+        # Enter the volume ID below
+        volumeID: volume_ID
+        fsType: ext4