title: run a job on all slaves of same label
body: <p>I have jobs that need to be run on all slaves of the same label. For that I am trying to use configuration matrix. </p>
  
  <ul>
  <li>Selecting the label only makes jenkins to use on of the slave in the right label.</li>
  <li>Adding the new slave on all my job is just troublesome (many jobs)</li>
  </ul>
  
  <p>So how can I make jenkins to run my jobs on a list of slaves?</p>
  
  <p>Regards</p>