Added some comments to exclusive gateway node impl.
Implemented mock for integration SPI.
Implemented send task integration test.
Refactored IDService. Added some tests.
Merge branch 'master' of github.com:catify/bpmn-engine into loopTasks
IdService test.
Merge branch 'master' of github.com:catify/bpmn-engine into loopTasks
fixed IdServiceTest to be able to test ExtensionService
removed sysouts, default version is now an empty string