Updated openstack/openstack
Project: openstack/keystone  b763d613b411b89d98088a1800f12e572fc4da5a

Use functions in oslo.utils

Keystone was using functions in oslo-incubator that have been
graduated into oslo.utils. This changes the function calls to use
the functions in oslo.utils.

Change-Id: I39365042de913e1b3edaf849e3f5578cef0b7b02