backing out the start_services flag
removing start_services
backing out rabbitmq stop
Merge pull request #698 from edx/jarv/stop-services-role

Jarv/stop services role
Supervisor doesn't resolve `hostname` so using ansible variable for unique worker names
calling stop_all_edx_services from abbey
adding role to stop all edx services
Merge pull request #700 from edx/jarv/stop-services-role

Jarv/stop services role
removing respawn from supervisor upstart
Merge pull request #702 from edx/cg/worker_hostname

Supervisor doesn't resolve `hostname` so using ansible variable
Merge pull request #701 from edx/jarv/stop-services-role

removing respawn from supervisor upstart
Remove 'mongo' role from the sandbox playbook.

We're using externally hosted mongo, so no need to install it locally.
Rename hardcoded 'studio' subdomain to 'cms'.

The edX CMS subdomain was hardcoded to studio.* in the nginx
configuration template. Rename it to cms.*, because that's
what we will be using.

It would be nice if this was configurable with ansible variables.
Update edxlocal's mysql tasks to work with external mysql.

The tasks are really convenient so that we don't have to create each of
the required databases by hand on the RDS instance.