[connection] reinstall cnx.data as cnx.transaction_data
Too much code expects self._cw.data to be session data.
backout 9b2f68916474
Related to #2503918
Related to #2912807
# -*- 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"""