Bug 1233540

Description of problem:
On deletion of a pod and a pvc, the pv's status does not become 'available' when it's reclaim policy is 'recycle', it can not be bound to another pvc.

Version-Release number of selected component (if applicable):
openshift v3.0.0.0-25-g235b0e7
kubernetes v0.17.1-804-g496be63

How reproducible:
Always

Steps to Reproduce:
1. Create an nfs pv, create pvc and pod
```pv
{
  "apiVersion": "v1",
  "kind": "PersistentVolume",
  "metadata": {
    "name": "nfs"
  },
  "spec": {
    "capacity": {
        "storage": "5Gi"
    },
    "accessModes": [ "ReadWriteOnce" ],
    "nfs": {
        "path": "/nfsshare",
        "server": "10.66.79.155"
    },
    "persistentVolumeReclaimPolicy": "Recycle"
  }
}
```

```pvc
{
    "apiVersion": "v1",
    "kind": "PersistentVolumeClaim",
    "metadata": {
        "name": "nfsc"
    },
    "spec": {
        "accessModes": [ "ReadWriteOnce" ],
        "resources": {
            "requests": {
                "storage": "5Gi"
            }
        }
    }
}
```

```pod
{
    "apiVersion": "v1",
    "kind": "Pod",
    "metadata": {
        "name": "nfs",
        "labels": {
            "name": "frontendhttp"
        }
    },
    "spec": {
        "containers": [{
            "name": "myfrontend",
            "image": "jhou/hello-openshift",
            "imagePullPolicy": "IfNotPresent",
            "ports": [{
                "containerPort": 80,
                "name": "http-server"
            }],
            "volumeMounts": [{
                "mountPath": "/mnt/nfs",
                "name": "pvol"
            }]
        }],
        "volumes": [{
            "name": "pvol",
            "persistentVolumeClaim": {
                "claimName": "nfsc"
            }
        }]
    }
}
```

2. Delete the pod and delete the PVC, the PV's status become 'released'
3. Wait for a moment at get the PV status again, it remains 'released'
4. Go to the NFS volume, verify it's data are deleted
5. Create a PVC again using the same json template
6. Get the PV status

Actual results:
After step 4:
Data on NFS volume are not deleted when the pod and pvc are deleted

After step 5:
The PVC can not bound the PV, PV is not available

After step 6:
The PV's status is 'Failed'

NAME      LABELS       CAPACITY     ACCESSMODES   STATUS    CLAIM           REASON
gluster   <none>       5368709120   RWO           Bound     jhou/glusterc   
iscsi     <none>       5368709120   RWO           Bound     jhou/iscsic     
local     type=local   5368709120   RWO           Bound     jhou/localc     
nfs       <none>       5368709120   RWO           Failed    jhou/nfsc   

Expected results:
The data on nfs volume should be scrubbed, the PV should become available and can be bound to new PVC

Additional info: