title: Jenkins Email-ext plugin default Jelly script shows all unit tests, not just failed ones
body: <p>I am using the Email-ext plugin on Jenkins, and the default Jelly script ${JELLY_SCRIPT,template="html"}.</p>
  
  <p>The template apparently outputs all unit tests in the email, not just the ones that have failed and made the build unstable. This is in itself a strange design decision since the important content gets lost, but is there an easy way to just output the failed tests in the email? I suppose I need to edit the default Jelly script template somewhere? Thanks!</p>