title: Maven Sonarqube Plugin: Multithreading
body: <p>Since maven supports multithread builds, would it be possible to also run sonar multithreaded?  (e.g. <code>mvn sonar:sonar -T 4</code> )</p>
  
  <p>I ran it and while the module reported success, it reports back as the overall build failing with <code>java.util.concurrent.ExcutionException: java.lang.NullPointerException</code></p>
  
  <p>Thoughts?</p>