Align Drools Submarine API to jBPM Submarine API, provide bridge between the two

Currently, the Maven plugin generates a Module in the org.drools namespace; jBPM uses the groupId; we should either merge the 2 modules into one generated Application (and remove the generate Module), or find a way to delegate. We should also add support to configuration in Drools as well. jBPM already supports configuring WorkItems through a typed API.

Deliverable: a PR