add maven batch mode

4 jobs for master in 4 minutes and 12 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
passed #1610
django

00:00:25

99.0%
passed #1611
selenium-test

00:00:59

 
  Staging
passed #1612
heroku-staging

00:01:28

 
  Production
passed #1613
heroku-production

00:01:17