Updated openstack/openstack
Project: openstack/oslo.concurrency  7f4a3bd01650f0fac8eb2a454e4b36affd8f3b46

Make lock_wrapper private

This is only intended to be called via the main() function, so it
doesn't need to be public.

Change-Id: Ia215abbe8f8b9e1d8f4f36027b95bc33788a1886