Updated openstack/openstack
Project: openstack/keystone  b27a9b2b8d570e2d2059d3f175d1809bfdde9756

Switch LdapIdentitySqlAssignment to use oslo.mockpatch

Referenced bug has been fixed in oslotest 1.1.0

Change-Id: I355798d1024399aca194e826ed8048812e44612b