add maven batch mode

4 jobs for master in 3 minutes and 56 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #1618
django

00:00:25

99.0%
passed #1619
selenium-test

00:00:57

 
  Staging
passed #1620
heroku-staging

00:01:17

 
  Production
passed #1621
heroku-production

00:01:16