title: Force Maven clean
body: <p>I have a project with 2 profiles, because UAT and PROD use different versions of the same jar.</p>
  
  <p>I have noticed that if i don't explicitly call <code>mvn clean ...</code> the deployed EAR will have BOTH UAT and PROD jars.</p>
  
  <p>Is there a way in the POM to specify that Maven should always clean before any building?</p>