[server/sources] fix name error in eid_type_source_pre_131
i.e. the eid_type_source implementation used when some pre 3.13.1
database is detected. Regression from 5fbdbbe51867.
# -*- 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 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.
"""