couple changes

switching the gunicorn worker back to sync. retrying conn_max_age in
postgresql
2 jobs for db_backend_test in 12 minutes and 50 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
passed test:3.7 #1441377

00:06:34

73.0%
 
  Branch
passed branch_image #1441378

00:06:15