'Get the volume encryption type for the specified volume type.
volume_type_id: Id of volume_type.'

def show_encryption_type(self, volume_type_id):

    url = ('/types/%s/encryption' % volume_type_id)
    (resp, body) = self.get(url)
    body = json.loads(body)
    self.expected_success(200, resp.status)
    return rest_client.ResponseBody(resp, body)
