[devtools] Fix database creation issues for CubicWebTestTC tests
To reproduce (with a purged repo):
* python web/test/test_jscript.py
* python web/test/unittest_views_xmlrss.py
The '__default_empty_db__' will contain the wrong 'base_url'
configuration, thus breaking URLs in the xmlrss tests.
Closes #9297611.
# -*- 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"""