If ctx present do a select around the rwait

Signed-off-by: Derek Collison <derek@nats.io>

js.go

@@ -435,7 +435,14 @@ func (js *js) PublishMsg(m *Msg, opts ...PubOpt) (*PubAck, error) {
 	if err != nil {
 		for r, ttl := 0, o.ttl; err == ErrNoResponders && r < o.rnum; r++ {
 			// To protect against small blips in leadership changes etc, if we get a no responders here retry.
-			time.Sleep(o.rwait)
+			if o.ctx != nil {
+				select {
+				case <-o.ctx.Done():
+				case <-time.After(o.rwait):
+				}
+			} else {
+				time.Sleep(o.rwait)
+			}
 			if o.ttl > 0 {
 				ttl -= o.rwait
 				if ttl <= 0 {