add maven batch mode

4 jobs for master in 4 minutes (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #1606
django

00:00:24

99.0%
passed #1607
selenium-test

00:00:58

 
  Staging
passed #1608
heroku-staging

00:01:23

 
  Production
passed #1609
heroku-production

00:01:14