Merge remote-tracking branch 'origin/pr/1148'

.travis.yml

@@ -7,7 +7,7 @@ script:
 
 matrix:
   include:
-  - jdk: oraclejdk8
+  - jdk: openjdk8
   - jdk: oraclejdk9
-  - jdk: oraclejdk11
+  - jdk: openjdk11