Simulating and testing SCXML statecharts

Statecharts with the SCXML domain can also be simulated in the same way standard statecharts are simulated. The only difference is that the YAKINDU simulation engine will use the Apache Commons SCXML engine under the hood. This ensures that the simulation shows the same behavior as when using the SCXML model in other contexts. The same holds for using our test framework SCTUnit with an SCXML statechart.