title: Checkstyle report not displayed in Hudson dashboard
body: <p>I meet same trouble. The checkstyle_report.xml is OK. 
  But the report can not display hudson dashboard. </p>
  
  <p><img src="https://i.stack.imgur.com/dFmOD.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/LYWyc.jpg" alt="enter image description here"></p>
  
  <p>How to fix this?</p>
  
  <p>Thanks in advance!</p>