Use trusty dist to try to fix jdk8 build problem

oliemansm · oliemansm · commit 3614ced5d1b3 · 2019-11-14T16:57:19.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,5 @@
 language: java
+dist: trusty
 jdk:
   - oraclejdk8
 script:
