For anyone trying to build Hawkular and running into checkstyle  issues despite adding -Dcheckstyle.skip to the mvn command line, you may need to add this as well to make sure it makes it to the recursive builds...

 > mvn  blahblah   '-Dsrcdeps.forwardProperties=srcdeps.*,revapi.skip -Dcheckstyle.skip'

p.s. the revapi.skip is not relevant to checkstyle but if you happen to hit a revapi issue it may help you out.