put the healthy check and etcdctl set in one ExecStartPre.
put the healthy check and etcdctl set in one ExecStartPre.

xuwang/coreos-docker-dev,remoe/coreos-docker-dev,xuwang/coreos-docker-dev,remoe/coreos-docker-dev,xuwang/coreos-docker-dev,remoe/coreos-docker-dev,xuwang/coreos-docker-dev,remoe/coreos-docker-dev