Fix test migration crash waiting to happen due to inferred relations
Avoid crashing when a relation definition which is already known (due to
being inferred) gets explicitly added. As explained in a comment, this
would deserve more thinking, but at least this fixes a test failure with
computed relations.
# -*- 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"""