Load config only when required

Enables unit testing of functions without having browserstack.json

Author: shirish87

lib/utils.js

@@ -1,9 +1,9 @@
 var Log = require('./logger'),
     logger = new Log(global.logLevel),
-    config = require('./config'),
     http = require('http'),
     url = require('url'),
-    querystring = require('querystring');
+    querystring = require('querystring'),
+    config;
 
 String.prototype.escapeSpecialChars = function() {
   return this.replace(/\n/g, '\\n')
@@ -51,6 +51,10 @@ var objectSize = function objectSize(obj) {
 };
 
 var alertBrowserStack = function alertBrowserStack(subject, content, params, fn) {
+  if (!config) {
+    config = require('./config');
+  }
+
   var endpoint = config.alert_endpoint || 'http://www.browserstack.com/automate/alert';
   var urlObject = url.parse(endpoint);