Fixes our tests for JDK 7
Fixes our tests for JDK 7

Oracle deprecated JDK 7 in a manner that broke Travis CI support as they can no longer download the SDK. See issue: https://github.com/travis-ci/travis-ci/issues/7884#issuecomment-308451879

christophermark/robin-java-sdk,robinpowered/robin-java-sdk,ccpmark/robin-java-sdk,ccpmark/robin-java-sdk,christophermark/robin-java-sdk,robinpowered/robin-java-sdk