title: symfony2 namespaces using render(controller(..))
body: <p>When I try to call:</p>
  
  <pre><code>{{ render(controller(
      'AppBundle:Default:_test'
  )) }}
  </code></pre>
  
  <p>this one works, but if I create Admin folder and move my DefaultController there and call it like that:</p>
  
  <pre><code>{{ render(controller(
      'AppBundle:Admin:Default:_test'
  )) }}
  </code></pre>
  
  <p>this error shows up</p>
  
  <blockquote>
    <p>("Unable to parse the controller name
    "AppBundle:Admin:Default:_test".")</p>
  </blockquote>
  
  <p>What I'm missing? Thanks.</p>