fix Travis distro for old JDKs

hboutemy · web-flow · commit ccb7a1786156 · 2019-10-22T22:50:45.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,10 +2,10 @@ language: java
 jdk:
   - openjdk7
   - oraclejdk8
-  - openjdk9
-  - openjdk10
   - openjdk11
 
+dist: trusty
+
 # No need for preliminary install step.
 install: true
 #
