Delete bulk_records.

    Arguments:

        prs:  parser object of argparse
        conn: dictionary of connection information

def parse_bulk_delete(prs, conn):
    """Delete bulk_records.

    Arguments:

        prs:  parser object of argparse
        conn: dictionary of connection information
    """
    prs_delete = prs.add_parser(
        'bulk_delete', help='delete bulk records of specific zone')
    set_option(prs_delete, 'infile')
    conn_options(prs_delete, conn)
    prs_delete.add_argument('--domain', action='store',
                            help='delete records with specify zone')
    prs_delete.set_defaults(func=delete)