title: Ember.js can't mock ajax using jquery-mockjax
body: <p>I use <code>jquery-mockjax</code> to mock my AJAX request for my tests and after I upgraded my ember from 2.3.0 -> 2.10.0 it no longer works because my service is using <code>Ember.$.ajax()</code> instead of directly <code>$.ajax()</code></p>
  
  <p>any idea how to make mockjax still work with <code>Ember.$.ajax()</code>? Or shall I just replace all <code>Ember.$.ajax()</code> instance to <code>$.ajax()</code>? Is this the only way?</p>