title: Strongloop: updateAttributes method id parameter is undefined
body: <p>I'm implementing a connector for strongloop.</p>
  
  <p>I try to updateAttributes by calling 
      PUT /api/entity/:id</p>
  
  <p>My connector's updateAttributes method is hit but the id parameter is undefined.</p>
  
  <pre><code>myConnector.prototype.updateAttributes = function(model, id, body, callback) {
  </code></pre>
  
  <p>Other methods like all, create, delete work.</p>
  
  <p>What is wrong?</p>
  
  <p>loopback version: 2.14.0
  node version: 0.10.36</p>