Adding in unit test for throw signal event in same transaction caught by boundary event, see https://forums.activiti.org/content/boundary-signal-causes-already-taking-transition (and validates the design design of v6!)

Fixed execution listener export (reported here: https://forums.activiti.org/content/execution-listener-not-getting-exported)

Missing getters/setters in Query & Entity

Missing getters/setters in Query & Entity

Similar action as https://github.com/Activiti/Activiti/commit/ddf9b515550c26bc6f884b91e4563e035497f0c2, now for v6. Way more work (as we used the CollectionsUtil heavily in the new behaviours)

Add missing getters to HistoricActivityInstanceQueryImpl (see https://forums.activiti.org/content/switching-persistence-layer)

factor deletion's exception byte array management and the execution/j…

factor deletion's exception byte array management and the execution/job relationship management out into separate methods.

Add support for populating localization values into the DynamicBpmnService cache from activiti extension elements on deployment of a process definition.

* ProcessInstance
* Execution (Process/SubProcess)
* HistoricProcessInstance

In addition, this change includes an improvement to add fallback support for resolving a localization.

(port of v5 commit https://github.com/Activiti/Activiti/commit/08a1fde0fe4cb3aa111bf0cef3ee902010925263) Introduced four new engine event types: historic process instance created/ended and historic activity created/ended, as an alternative to existing events.
The use case is similar to the default process started/ended and activity started/completed, but used the Historic entities which adds additional data (startUserId, duration, etc.).
Also fixed the historic activity instance creation for subprocess start events (were missing + had incorrect end time).

bug fix for null overwrite of formKey if it exissts

[Scripting] Add 'nashorn.global' object to unstored keys. Also add a method to add new keys at runtime.

Merged BpmnDeployer refactoring. Made classnames and class members consistent with typical Activiti conventions. Renamed ExpandedDeployment to ParsedDeployment and extracted Builder and BuilderFactory into its own classes.

Merge branch 'activiti6-bpmn-deployer-refactoring' of https://github.com/stpm/Activiti into stpm-activiti6-bpmn-deployer-refactoring

Ported https://github.com/Activiti/Activiti/commit/bae3f8feb99a0b2f105f3837fa764b6637e530e8  to v6 + added the custom maybatis mappers from v5