Changes

• 2857d030 partial revert of 47e334310f8cee3d8bbb524395ba722f769c271d to add root modules back
• 937168a3 Issue #306: update to Checkstyle 8.45
• f877da52 Issue #316: Allow third party checks to have a custom group name
• 47e33431 Issue #256: trim back old meta data files to rely on checkstyle

Please read the Checkstyle release notes for details on recent and potentially breaking changes in Checkstyle. Checkstyle configuration files potentially need to be adapted to this version.