fixed model and rwg wgt

Please note that you are using the wrong repo for storing cards: it should be https://gitlab.cern.ch/cms-gen/genproductions_cards/, according to https://cms-generators.docs.cern.ch/how-to-produce-gridpacks/mg5-amcnlo/

That's not relevant to the test, but once everything is working fine, we should move to the standard folders.