title: How to activate the "Logback setup" debug mode using groovy configuration file?
body: <p>I would like to activate the logback internal devbug mode (to get more information during the logback setup). </p>
  
  <p>I know how to do this in xml file (using a debug="true" in the configuration declaration).
  I discovered that it could be possible to force the flag using a system property (but I didn't achieved that)</p>