etcd: Pass through the namespace

This is a bit tricky, and we should nuke and redo some of this API. The
sneaky bit has to do with whether we've already added the namespace
magic into our etcd client or not.

etcd/etcd.go

@@ -1464,7 +1464,7 @@ func (obj *EmbdEtcd) MakeClient() (interfaces.Client, error) {
 func (obj *EmbdEtcd) MakeClientFromNamespace(ns string) (interfaces.Client, error) {
 	kv := namespace.NewKV(obj.etcd.KV, ns)
 	w := namespace.NewWatcher(obj.etcd.Watcher, ns)
-	c := client.NewClientFromNamespace(obj.etcd, kv, w)
+	c := client.NewClientFromNamespace(obj.etcd, kv, w, ns)
 	if err := c.Init(); err != nil {
 		return nil, err
 	}