WIP: Start, stop, and supervise gwcelery with monit

This is an alternative to !343.
7 jobs for monit in 1 minute and 55 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Dist
passed #278660
dependencies/python3.6

00:00:20

passed #278659
sdist

00:00:24

 
  Test
passed #278661
bdist

00:00:20

passed #278664
doc

00:01:01

passed #278663
lint

00:00:21

passed #278662
test/python3.6

00:01:04

90.0%
 
  Deploy
passed #278665
docker/python3.6

00:00:26