Platform BZ for https://issues.jboss.org/browse/DROOLS-763
Implemented by https://github.com/droolsjbpm/droolsjbpm-knowledge/commit/d9188aded and https://github.com/droolsjbpm/drools/commit/2c1f6f4ff
Verified on BRMS 6.2.0.ER3. Test org.drools.compiler.integrationtests.Misc2Test.testKieBuilderWithClassLoader() was used for verification.