Use case single sub process conversion

[eschabell]

This case will convert an existing simple single jPDL 3 sub process definition and gdm file to their BPMN counter part.

The following jPDL shall function as input will be added here as a test process:

start -> process-state -> end

Create a unit test to do the following:

• validate incoming jpdl 3 agains jpdl 3.2 xsd
• convert the jpdl 3 definition to bpmn 2.0
• validate output bpmn 2.0 definition against bpmn 2.0 xsd

[eschabell]

This is the example flow I am using, a bit more complex with variables input and output:

[eschabell]

Commited changes that process part of sub-process use case. These fixes convert callActivity, dataInput and dataOutput elements. Still remains to process inputSet, outputSet, dataInputAssociation, dataOutputAssociation elements can write a test case.

[eschabell]

Finished up use case stylesheet, still need to finish up the unit test.

[eschabell]

Final implementation of sub-flow use case, includes a variable passing in and out of the sub-flow. Closed by c59d75064bcb57fbe4d1625697852ecb549fd06c.