Add tooz

After the design session at the HK summit for the blueprint
https://wiki.openstack.org/wiki/Oslo/blueprints/service-sync we
decided to create a dedicated project which will coordinate
distributed systems.

https://launchpad.net/tooz

Change-Id: I7d80b9c70bd4d1eecbd2a1912ad21901234db0eb
Add gate-solum-devstack job

Add an initial devstack job for the stackforge project, solum.  It just
installs solum's devstack integration and runs devstack.  That just
ensures that the devstack integration doesn't blow up just trying to
start up the service(s).  There's not much else to test yet, but this is
a starting point to build on.

Start this job out as non-voting so that we can make sure it works as
expected before turning it on to be gating.

Change-Id: I4fd370abfcc51b71b250298163d1348a8a5c1bef
Merge "Add gate-solum-devstack job"
Merge "Add tooz"