[test] when the config change, we should cleanup sys.path and sys.modules. Closes #3634164
Without this, modules imported within instance home will be messed up.
# -*- 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 specific hooks and operations"""