Copies etcd in case it not exists an existing etcd folder.
Copies etcd in case it not exists an existing etcd folder.

Change-Id: Ifd607705f30ec9e587883a5f4fcd391ac48e65c0
Closes-Bug:#1530646

openstack/dragonflow,openstack/dragonflow,FrankDuan/df_code,openstack/dragonflow,FrankDuan/df_code,FrankDuan/df_code