Review drools-mvel dependency in drools-test-coverage. e.g. replace MvelConstraint to LambdaConstraint. 

Update: Actually I made tests parameterized so that both MvelConstraint and LambdaConstraint can be tested. It will be easy to drop MvelConstraint in the future but at the moment, parameterized tests are nice to confirm the compatibility between standard-drl and exec-model.