Updated checkstyle maven plugin + definitions file (aligning it with IDEA plugin).

Change-Id: I8379ff69e4608fb3aa85fdb39d23cbf54f0f4689
Signed-off-by: Michal Gajdos <michal.gajdos@oracle.com>
Merge "Updated checkstyle maven plugin + definitions file (aligning it with IDEA plugin)."