Use Xenial, OpenJDK 8 for Travis builds

dagnir · dagnir · commit 59c1ed1379d4 · 2020-01-08T09:41:12.000-08:00
- OracleJDK 8 doesn't seem to work on Xenial, and it's not necessary anyway
 - Fixes the strange compile error for JDK 11 on Precise
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,9 @@
 language: java
 jdk:
-  - oraclejdk8
+  - openjdk8
   - openjdk11
 sudo: true
-dist: precise
+dist: xenial
 install: /bin/true
 notifications:
   email:
