replicate the scala compiler sttings from v2.x branch for travis build
replicate the scala compiler sttings from v2.x branch for travis build

DiUS/pact-jvm,DiUS/pact-jvm,flaregames/pact-jvm,algra/pact-jvm,algra/pact-jvm,olga-vasylchenko/pact-jvm,Fitzoh/pact-jvm,Fitzoh/pact-jvm