openjdk7 for travis

olamy · olamy · commit f1174c790059 · 2018-02-19T11:55:30.000+10:00
Signed-off-by: olivier lamy &lt;olamy@apache.org&gt;
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,8 @@ language: java
 jdk:
   - oraclejdk8
   - oraclejdk9
-
+  - openjdk7
+  
 script: "mvn --show-version --errors --batch-mode clean verify"
 
 cache:
