Merge pull request #305 from daniellienert/task/exchange-java-package

TASK: Exchange java package in travis configuration

Author: daniellienert

.travis.yml

@@ -6,7 +6,7 @@ git:
 addons:
   apt:
     packages:
-      - oracle-java8-set-default
+      - openjdk-8-jre-headless
 matrix:
   include:
     - php: 7.2