'Test that qos_policy_id set to None will remove all qos rules from
given port.'

def test_port_qos_disassociation(self):

    port_dict = self._create_port_with_qos()
    port_dict['qos_policy_id'] = None
    self.agent.port_update(None, port=port_dict)
    self.wait_until_bandwidth_limit_rule_applied(port_dict, None)
