[rqlrewrite] sort possible types when turning is_instance_of into is
Helps get predictable output even with python -R. Related to #4959402.
# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s schema"""