title: Sonataadminbundle: Multiple admin section for same entity
body: <p>I have entity class <code>Page</code> with column <code>type=integer</code>. When I do:</p>
  
  <pre><code>   &lt;service id="sonata.admin.pages" class="Main\ProgramBundle\Admin\PageAdmin"&gt;
        &lt;tag name="sonata.admin" manager_type="orm" group="dashboard" label="Pages"/&gt;
        &lt;argument /&gt;
        &lt;argument&gt;Main\ProgramBundle\Entity\Page&lt;/argument&gt;
        &lt;argument&gt;SonataAdminBundle:CRUD&lt;/argument&gt;
    &lt;/service&gt;
  
  
     &lt;service id="sonata.admin.groups" class="Main\ProgramBundle\Admin\GroupAdmin"&gt;
        &lt;tag name="sonata.admin" manager_type="orm" group="stories" label="Groups"/&gt;
        &lt;argument /&gt;
        &lt;argument&gt;Main\ProgramBundle\Entity\Page&lt;/argument&gt;
        &lt;argument&gt;SonataAdminBundle:CRUD&lt;/argument&gt;
    &lt;/service&gt;
  </code></pre>
  
  <p>In short, both sections work on same entity except that each have different queries and forms.</p>
  
  <p>But what happens is that sonata always executes Admin/GroupAdmin, even if I select PageAdmin. How to do this?</p>