Move Travis to openjdk8

Something about Oracle and licenses. Who woulda thought
2019-08-03 13:10:20 -04:00 · 2019-08-03 13:10:20 -04:00 · 9dfffe5366
Commit 9dfffe5366
--- a/.travis.yml
+++ b/.travis.yml
@ -1,6 +1,6 @@
 language: java
 jdk:
-  - oraclejdk8
+  - openjdk8
 script: gradle clean compileJava compileTestJava test
 install: true
 notifications: