Updated openstack/openstack
Project: openstack/keystone  ae0abaad60d31cc6c3e74c562f2b0694411c6471

test_utils use jsonutils from oslo.serialization

jsonutils in oslo-incubator is deprecated so should not be used.

Change-Id: Ib4e80dd8504d4ccbd831ad15ba4235d8245474f2