Returns an argument parser for the sub-command's CLI.

     :param mod: the sub-command's python module
     :param modnam: the string name of the python module
     :return: ArgumentParser

def get_module_parser(mod, modname, parents=[], add_help=True):
    """
    Returns an argument parser for the sub-command's CLI.

     :param mod: the sub-command's python module
     :param modnam: the string name of the python module
     :return: ArgumentParser
    """
    return argparse.ArgumentParser(
        usage=configuration.EXECUTABLE_NAME + ' ' + modname + ' [options]',
        description=mod.get_description(), parents=parents,
        add_help=add_help)