Updated openstack/openstack
Project: openstack/keystone  4670606b148611eaddf1c76e5ee11b2b7168d511

Some methods in ldap were moved to superclass

Methods add_user and remove_user was moved from RoleAPI and GroupAPI
to the superclass BaseLdap for unification.

Change-Id: Iacc9c87cee4b62b5535d2ad6515a6f58942257e6