Added openjdk 8 to travis

Author: ic0ns

.travis.yml

@@ -6,6 +6,7 @@ jdk:
   - oraclejdk8
   - oraclejdk7
   - openjdk7
+  - openjdk8
 
 #branches:
 #  only:
@@ -15,4 +16,4 @@ notifications:
   email:
     recipients:
     - juraj.somorovsky@hackmanit.de
-    - robert.merget@rub.de
+    - robert.merget@rub.de