Update etcd version in tests
Update etcd version in tests

Change-Id: Ie55a35c7d83a9512fa82385d333944a50f10ab93
Signed-off-by: Julien Danjou <5c682c2d1ec4073e277f9ba9f4bdf07e5794dabe@danjou.info>

openstack/tooz,openstack/tooz