chore(travis): log used ports

Author: vojtajina

lib/browser-stack/start-tunnel.js

@@ -25,9 +25,8 @@ var tunnel = new BrowserStackTunnel({
   hosts: hosts
 });
 
-
+console.log('Starting tunnel on ports', PORTS.join(', '));
 tunnel.start(function(error) {
-  console.log('** callback **')
   if (error) {
     console.error('Can not establish the tunnel', error);
   } else {