title: Symfony2 how to load validation.yml
body: <p>When following Symfony2's validation documentation (http://symfony.com/doc/current/book/validation.html) the writer often refers to </p>
  
  <p><code>
  src/Acme/BlogBundle/Resources/config/validation.yml
  </code> </p>
  
  <p>I also have this file, at the proper location (accounting for my bundle name and vendor ofcourse) but it is completely ignored. </p>
  
  <p>Do I need to load this from somewhere?</p>