MULE-7919: Upgrade Json Schema validator to support draft-04 rfc

it's not exactly the same parameters but they are the same cases. Reason why it makes sense to do this is because in one i'm testing the standalone validator (which will become relevant in 3.7), and in the other I'm testing the XML message processor which wraps it and its configurator. I actually found bugs in the MP even though the validator had all green tests, which verifies the validity of this test