[dataimport] remove drop_index parameter from massive store
"drop_index=False" also implied not dropping any constraints, in
particular foreign keys, which meant any attempt to import entities
would fail, because we only add metadata (the entities table) after the
entity's insertion.
# -*- 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.
"""