We intend to use etcd as data store for Zun, so we need to set up etcd server and client in devstack. Part of blueprint etcd-db-driver Change-Id: I63bf91bc0cdb894b53c4f8385c7d3d651035831a
We intend to use etcd as data store for Zun, so we need to set up etcd server and client in devstack. Part of blueprint etcd-db-driver Change-Id: I63bf91bc0cdb894b53c4f8385c7d3d651035831a