Updated openstack/openstack
Project: openstack/requirements  e5cb0b079509111adf6df20dd2a7383f8edaaadf

Add tooz to requirements

Tooz is a library for helping to coordinate
distributed systems (which openstack is) and useful
for doing group membership, locking, and providing
other capabilities for the various openstack projects.

Change-Id: Ib047a1e079b68a7d99afe4188355ea51b96a3441