Merge pull request #183 from robbavey/fix_travis_jdk

Fix travis builds

Author: robbavey

.travis.yml

@@ -17,5 +17,5 @@ matrix:
   fast_finish: true
 install: true
 script: ci/build.sh
-jdk: oraclejdk8
+jdk: openjdk8
 before_install: gem install bundler -v '< 2'