rule flow evaluation fails with an error Unsupported rule language 'Java' after upgrading to RHDM 7.0

Issue

If Implementation is set to 'Java' in BusinessRuletask by JBDS/BPMN2 Modeler, rule flow validation fails like the following after upgrading to RHDM7.0.

05:33:59.750 [main] ERROR o.d.c.kie.builder.impl.KieProject - Unable to build KieBaseModel:process
[-1,-1]: Process 'Hello World' [com.sample.bpmn.hello]: Node 'Business Rule Task 1' [3] Unsupported rule language 'Java'

java.lang.RuntimeException: Error while creating KieBase[Message [id=1, kieBase=process, level=ERROR, path=/dev/workspace/RuleFlow test/target/classes/process/sample.bpmn, line=-1, column=0
text=Process 'Hello World' [com.sample.bpmn.hello]: Node 'Business Rule Task 1' [3] Unsupported rule language 'Java']]
at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:554)
at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:679)
at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:647)
at com.sample.ProcessTest.main(ProcessTest.java:17)

This rule flow worked with BRMS6.