'Show metadata item for the volume.'

def show_volume_metadata_item(self, volume_id, id):

    url = ('volumes/%s/metadata/%s' % (volume_id, id))
    (resp, body) = self.get(url)
    body = json.loads(body)
    self.expected_success(200, resp.status)
    return rest_client.ResponseBody(resp, body)
