Add options specific to schema subcommand.

def _schema_options(p):
    """ Add options specific to schema subcommand. """

    p.add_argument(
        'resource', metavar='selector', nargs='?',
        default=None).completer = _schema_tab_completer
    p.add_argument(
        '--summary', action="store_true",
        help="Summarize counts of available resources, actions and filters")
    p.add_argument('--json', action="store_true", help=argparse.SUPPRESS)
    p.add_argument("-v", "--verbose", action="count", help="Verbose logging")
    p.add_argument("-q", "--quiet", action="count", help=argparse.SUPPRESS)
    p.add_argument("--debug", default=False, help=argparse.SUPPRESS)