Updated openstack/openstack
Project: openstack/keystone  e17098812364ab4efb7a40d8f11c9d6b668d39d5

Use oslo.test mockpatch

Keystone was using mockpatch from oslo-incubator. Since oslo has
migrated these parts to oslo.test, switch to the oslo.test versions.

Note that these modules aren't mentioned in openstack-common.conf,
otherwise this change would remove it.

Change-Id: I2d4cd0b3e980d397b0111f25b2f645ae09dd9199