title: Move Symfony2 service config to bundle
body: <p>I have the following in my config.yml</p>
  
  <pre><code>services:
      my.user_provider:
          class: Acme\MySecurityBundle\Security\UserProvider
  </code></pre>
  
  <p>but would like to move this to config.yml in my <code>MySecurityBundle/Resources/config</code> but Symfony2 tells me that the service doesn't exist when I move it.</p>
  
  <p>How do I get it to pick up the <code>config.yml</code> file from there?</p>