Added countdown time to docker-stack-rm.

Added check for compose plugin and legacy docker-compose.

docker-stack-rm

@@ -18,5 +18,5 @@ RUNNING_STACK=$( echo $PARENT_DIR | cut -d " " -f1 )
 # if we found a running stack, bring it down.
 echo "Removing stack $RUNNING_STACK..."
 docker stack rm $RUNNING_STACK
-echo "Waiting for 30 seconds for services to terminate..."
-sleep 30
+WAIT=30
+for i in `seq $WAIT -1 1` ; do echo -ne "\rWaiting $i seconds for services to terminate..." ; sleep 1 ; done