add maven batch mode

4 jobs for master in 3 minutes and 57 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #1614
django

00:00:24

99.0%
passed #1615
selenium-test

00:00:57

 
  Staging
passed #1616
heroku-staging

00:01:20

 
  Production
passed #1617
heroku-production

00:01:15