title: How to trigger a job for each configuration in a matrix project
body: <p>I have to achieve the following :
  I have a multiconfiguration project A having two configuration C1 and C2, now for each successfull configuration I want to build another project B, say:</p>
  
  <ul>
  <li>if C1-success and C2-fails then C1 --> B</li>
  <li>if C1-fail and C2-success then C2 --> B</li>
  <li>if C1-success and C2-success then C1 --> B and then C2 --> B (only one instance of B can run at a time)</li>
  </ul>
  
  <p>Currently if one of the configuration fails then the parent is marked as fail which stops triggering of the downstream project.</p>