def tearDown(self):
        super(SimpleInstanceTest, self).tearDown()
        CONF.network_label_regex = self.orig_conf
        CONF.ip_start = None
def add_arguments(self, parser):
        parser.add_argument('--noinput', action='store_false',
                            dest='interactive', default=True,
                            help='Do not prompt for input of any kind.')
        parser.add_argument('-l', '--list', action='store_true',
                            dest='list', default=False,
                            help="Just list the requirements, don't install them.")