title: Sonar 2.9 does not import SuppressionFilter
body: <p>I am trying to create new rules profile in Sonar 2.9 with my checkstyle rules xml. When I try to import a checkstyle rules file with suppression filter configured, sonar gives me following messages:</p>
  
  <pre><code>Profile 'test2' created. Set it as default or link it to a project to use it for next measures.   [hide]
  Checkstyle filters are not imported: SuppressionCommentFilter
  Checkstyle filters are not imported: SuppressionFilter   [hide]
  </code></pre>
  
  <p>I am not bothered about SuppressionCommentFilter for now, but how to enable SuppressionFilter? If it is not possible, is there any other way to have a similar functionality of excluding specific files from specific checks in Sonar?</p>