'Deletes the Specified Volume_type.
For a full list of available parameters, please refer to the official
API reference:
http://developer.openstack.org/api-ref/block-storage/v1/#delete-volume-type-v1'

def delete_volume_type(self, volume_type_id):

    (resp, body) = self.delete(('types/%s' % volume_type_id))
    self.expected_success(202, resp.status)
    return rest_client.ResponseBody(resp, body)
