title: TFS2010 Build does not run unit tests
body: <p>I have a build definition in TFS2010, I queue the build manually and set Disable Tests flag to False.
  However, my unit tests are still not getting run. I reviewed the xaml file and it appears fine. The configuration used for the build is "Release".
  Is there something else that needs to be done?
  Unit test related snippet:</p>
  
  <blockquote>
  <pre><code>if Condition="[Not DisableTests]" DisplayName="If Not DisableTests"
  </code></pre>
    
    <p>sap:VirtualizedContainerService.HintSize="1178,2157"
    mtbwt:BuildTrackingParticipant.Importance="Low">
                                    
                                      </p>
  </blockquote>