Update .travis image to trusty (openjdk8 support)

vadeg · vadeg · commit 88131c5a4e29 · 2017-05-22T20:48:58.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,8 @@ language: java
 jdk:
     - openjdk8
     - oraclejdk8
+      
+dist: trusty
 
 addons:
     postgresql: "9.6"
