The use of Nashorn JS interpreter broke the JDK 1.7 builds. Not sure we really care. Moving on for now.

sscarduzio · sscarduzio · commit 50658acb64cb · 2016-04-23T19:56:34.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,8 @@
 language: java
 
 jdk:
-  - openjdk7
-  - oraclejdk7
+#  - openjdk7
+#  - oraclejdk7
   - oraclejdk8 
 
 after_success:
