use openjdk7 because oraclejdk7 not supported on Trusty distribution #https://github.com/travis-ci/travis-ci/issues/7964
use openjdk7 because oraclejdk7 not supported on Trusty distribution #https://github.com/travis-ci/travis-ci/issues/7964

TSaaP/tsaap-notes,elaastic/elaastic-questions,elaastic/elaastic-questions,TSaaP/tsaap-notes,elaastic/elaastic-questions