Used tooz distribued lock mechanism for synchronizing various
vnf instance tasks like instantiate, terminate and heal. It
supports various backends, such as etcd, mysql, file locks, redis,
zookeeper, etc.
This change imports the "coordination" module, which is shared by
Cinder, Manila and a few other projects.
The lock backend can be selected using the CONF.coordination.backend_url
config option.
Change-Id: Ia4979571e788ecc4874ae0b62533fbc5277253a8
Blueprint: support-etsi-nfv-specs
cff8c75682