[multi-sources] closes #1918120: drop behaviour leading to wrong result as demonstrated by the ticket
The formerly implemented behaviour doesn't seems to be useful,
nor to have a chance to be correct. At least no test case demonstrate
the opposite, so I've dropped it.
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s precreate script, executed at instance creation time or when
the cube is added to an existing instance, before the schema is serialized.
This is typically to create groups referenced by the cube'schema.
"""