Avoid running this example if zookeeper is not found
Avoid running this example if zookeeper is not found

Change-Id: I4461dcbfc28bed839deeb4e4564daa07c55b42b0

openstack/taskflow,jimbobhickville/taskflow,jimbobhickville/taskflow,pombredanne/taskflow-1,openstack/taskflow,pombredanne/taskflow-1