Fixed an DB migration issue from savi-iam to juno

Moved an fix from version 009 to 013, because migration 009
won't be executed when migrating from branch 'savi-iam' to
'stable/juno'. Please reference the following link for the details
of the fix.

https://github.com/openstack/keystone/commit/329b00d6dbd624f5554a9c5578b9f6a8070f3312