'Disassociate the specified QoS with specified volume-type.'

def disassociate_qos(self, qos_id, vol_type_id):

    url = ('qos-specs/%s/disassociate' % qos_id)
    url += ('?vol_type_id=%s' % vol_type_id)
    (resp, body) = self.get(url)
    self.expected_success(202, resp.status)
    return rest_client.ResponseBody(resp, body)
