Problem: user wants to add a custom process engine plugin as a module to wildfly. Currently, the user has to edit/modify the camunda-engine-subsystem's module.xml.
- I can add engine plugins to the module.xml of the optional module org.camunda.bpm.camunda-engine-plugins
- the subsystem's module.xml of wildfly and jboss doesn't need to be changed
- I can read documentation how to add an engine plugin to jboss based application servers