Merge branch 'jibsheet/test-courses-more' of github.com:edx/configuration into jlajoie/move-elasticsearch-init

git_add_course uses the platform's sysadmin dashboard which assumes it
can create an xlog mongo database and write into it without auth
configured.  This is not something we want to spend more time enabling,
so switch to our 'standard' import technique.

This relies on the demo role more than I would like, but we have a
backlog task to clean that role up, and can touch this at the same time
(this role has always imported a bunch of vars from demo, so I'm not
 adding any new deps).

Allow for a list of users that have credentials.

Added monitoring tag to rabbitmq ansible

Leaving the old vars here for compatibilty.  They can be removed at some future time.

We don't need a separate fullstack installation any more

sync the locust role with edx-load-tests

ECOM-7207

* Do not start locust automatically, instead make the locust user
  suitable for interactive manipulation and execution of the codebase.
  This works well for the current iteration of edx-load-tests which
  expects the user to hand-modify settings files.

* For convenience, the locust user gets dropped straight into the
  edx-load-tests codebase and sources a virtualenv with most
  dependencies already installed.

* Add an extra MOTD related to loadtesting

PERF-415

Improve docs and become www-data

I see no reason for us not to retry

The continuous-deliver/ playbooks are already doing this.

mattdrayer/ENT-244: Add ENTERPRISE_SERVICE_URL setting

mattdrayer: Remove ENTERPRISE_API_URL setting

Change the default XQUEUE_RABBITMQ_TLS value to false

We didn't need this previously, so I'm a little concerned by it.
Tweaked as part of DEVOPS-5543

rabbitmq memory alerting

Make prior RabbitMQ TLS changelog more accurate, and add a new entry for setting `XQUEUE_RABBITMQ_TLS` to false

Don't truncate version shas when tagging AWS resources.

update mongodb version and repo