Cluster all to one machine.

Alsa, add connection logging to rabbitmq.
Get rid of commented task.
Merge pull request #1608 from edx/feanil/common_cluster_updates

Feanil/common cluster updates
Clean up based on TODO.
Merge pull request #1615 from edx/feanil/env_update

Clean up based on TODO.
Switch from legacy variable templating system to Jinja2 everywhere