'Initialize command line argument parser.
Args:
parser: argparse.ArgumentParser'

@classmethod
def initArgumentParser(cls, parser, defaults=None):

    super(KubeSmokeTestScenario, cls).initArgumentParser(parser, defaults=defaults)
    defaults = (defaults or {})
    parser.add_argument('--test_namespace', default='default', help='The    namespace    to    manage    within    the    tests.')
