Please replace the groovy-all-2.3.0.jar bundled with container distributions with a newer version. Groovy 2.3 had 10 more releases and is currently available as 2.3.11 - Groovy 2.4 is also stable since a long time and is currentl available as 2.4.5.

I would appreciate even more if this could become a regular maintenance task when releasing new versions of Camunda BPM! Many thanks!