Description of problem:
When you try to execute StartProcessCommand with various parameters using SOAP interface, you will get JAXBException.

Version-Release number of selected component (if applicable):
6.2.0 ER5

Steps to Reproduce:
1. Execute StartProcessCommand with various parameters using SOAP.
2. See the result.

Actual results:
javax.xml.ws.soap.SOAPFaultException: Marshalling Error: class org.kie.remote.jaxb.gen.List nor any of its super class is known to this context.

Expected results:
No exception

Additional info:
It worked well on ER4. It seems that this bug might have been introduced by the following commit which deals with org.kie.remote.jaxb.gen.List:
https://github.com/droolsjbpm/droolsjbpm-integration/commit/78b5d38f99ce172b428f114e00c8d87197bcbb9f

This is the failing test:
https://gitlab.mw.lab.eng.bos.redhat.com/bxms/brms/blob/master/test-jbpm-integration/src/test/java/org/jboss/qa/bpms/jbpm/integration/remote/process/variable/ObjectVariableTest.java#L84-105