Merge branch 'ramparts_and_ha' into devel

* ramparts_and_ha: (21 commits)
  Rename database migrations for devel integration
  Integrate callback receiver refactoring
  Fix an issue running jobs in the cluster
  Implement a more dynamic celery queue system
  Purge old munin monitors and tools
  Refactor Tower HA Instance logic and models
  Docker compose improvements
  Initial Docker Compose workflow for Tower cluster
  Add memcached role for setup playbook
  Removing qpid from deb packaging
  Refactor rabbitmq role
  Integrate memcached into setup playbook
  Remove mongodb shutdown task
  Remove dependency on erlang_sd_notify
  Add initial rabbitmq role
  Initial rabbitmq setup playbook integration
  Update development environment for rabbit
  Replace qpid with rabbitmq
  Remove redis role from setup playbook
  Update qpid packaging, remove migrations
  ...

tools/docker-compose.yml

@@ -3,9 +3,16 @@ services:
   # Primary Tower Development Container
   tower:
     image: gcr.io/ansible-tower-engineering/tower_devel:${TAG}
+    hostname: tower
+    environment:
+      RABBITMQ_HOST: rabbitmq
+      RABBITMQ_USER: guest
+      RABBITMQ_PASS: guest
+      RABBITMQ_VHOST: /
     ports:
       - "8080:8080"
       - "8013:8013"
+      - "5555:5555"
     links:
       - postgres
       - memcached
@@ -20,10 +27,8 @@ services:
   # Postgres Database Container
   postgres:
     image: postgres:9.4.1
-
   memcached:
     image: memcached:alpine
-
   rabbitmq:
     image: rabbitmq:3-management