cleaned .travis.yml - removed openjdk8 - not known by travis
cleaned .travis.yml - removed openjdk8 - not known by travis

RapidPM/rapidpm-microservice,jforge/rapidpm-microservice,jforge/rapidpm-microservice,JavaMicroService/rapidpm-microservice,JavaMicroService/rapidpm-microservice,RapidPM/rapidpm-microservice