Test Map/Reduce in compatibility mode

Once ISPN-4002 is in place, we need a test that:

• starts a cluster in compatibility mode
• populates cache A with Person objects (protobuf) through the java hotrod client
• on the server a Map/Reduce task is run on the Person cache, which filters out all the persons with a given name and, for each matching person, it outputs something like (personId, age) into a result cache (as per ISPN-4002)
• the client reads the result cache and validates that it is correct