travis: use jdk9 instead

erizocosmico · ajnavarro · commit 49c4028cc92a · 2018-10-17T13:38:59.000+02:00
Signed-off-by: Miguel Molina <miguel@erizocosmi.co> (cherry picked from commit 5881f6a)
diff --git a/.travis.yml b/.travis.yml
@@ -77,7 +77,7 @@ jobs:
         - make TEST=ruby integration
     
     - language: java
-      jdk: oraclejdk10
+      jdk: oraclejdk9
       before_install:
         - eval "$(gimme 1.11)"
       install:
