Updated openstack/openstack
Project: openstack/pylockfile  777758cdf4520271370b3338b86b5c66f9b104f0

Begin moving some of the common code to a shared base

To enable the addition of a new lockfile impl that
has some of the similar functionality as the existing impls
in pylockfile we need to break out what will be shared and
what will not be shared by the existing impls and the soon
to be added new impl.

Change-Id: I3fddfb05b78657ebed1449f0389004061e7e7082