Description of problem:

This issue is very similar to BZ 1120972, the only difference is that we get a ClassCastException instead of NPE:


java.lang.ClassCastException: org.drools.core.builder.conf.impl.ResourceConfigurationImpl cannot be cast to org.drools.core.builder.conf.impl.JaxbConfigurationImpl
	at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl$3.build(CompositeKnowledgeBuilderImpl.java:195)
	at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.buildResourceType(CompositeKnowledgeBuilderImpl.java:158)
	at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.buildResources(CompositeKnowledgeBuilderImpl.java:148)
	at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:104)
	at org.drools.compiler.kie.builder.impl.AbstractKieModule.buildKnowledgePackages(AbstractKieModule.java:243)
	at org.drools.compiler.kie.builder.impl.KieContainerImpl.createKieBase(KieContainerImpl.java:494)
	at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:457)
	at org.drools.compiler.integrationtests.XSDResourceTest.testXSDResourceNotBreakingCompilation(XSDResourceTest.java:34)


The exception is thrown when you try to create a KieBase, containing a XSD resource, using KieClasspathContainer.

Since the original issue with NPE came from a customer, proposing blocker flag.

Version-Release number of selected component (if applicable):
BRMS 6.3.0 ER1

How reproducible:
always

Steps to Reproduce:
1. run XSDResourceTest from the PR (to be created)

Actual results:
The test throws CCE during constructing a KieBase.

Expected results:
The test passes.