Update checkstyle config to output results to the console
Update checkstyle config to output results to the console

This makes it easier to run checkstyle from the command line with:

    mvn checkstyle:checkstyle

Change-Id: Ib1bc76253fb36e2c50c115fa7355e326f6bde752

svanoort/gerrit-events,sonyxperiadev/gerrit-events,scoheb/gerrit-events,rinrinne/gerrit-events,dpursehouse/gerrit-events