fix(web-server): since node 12 there is no util.puts

see https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md
and nodejs/node#25377

testapp/scripts/web-server.js

@@ -3,7 +3,6 @@
 var express = require('express');
 var bodyParser = require('body-parser')
 var optimist = require('optimist');
-var util = require('util');
 var path = require('path');
 var env = require('../../spec/environment.js');
 
@@ -27,7 +26,7 @@ var main = function() {
   testApp.use(bodyParser.json());
   testApp.use(testMiddleware);
   testApp.listen(port);
-  util.puts(["Starting express web server in", testAppDir ,"on port", port].
+  console.log(["Starting express web server in", testAppDir ,"on port", port].
       join(" "));
 };