Initial support for journals service

Loop over all redis queues

This keeps us under the 20 metrics per request AWS API Limit.

OPS-3196

Update MMS Agent versions.

Filter out redis_queues, then limit to max_metrics

[server_utils] Only receive PPA key if it isn't expired

CloudWatch is throwing errors when we go past 20

OPS-3196

Add ghprb cancel on update feature to config

curl files from files.edx.org for jenkins worker

Allow easy override of the gunicorn timeout

remove edx-east sym link in packer scripts

Clean up old nginx sites

This all dates from June 2013 and has been hanging out in the nginx
configuration for years unused.

Reload nginx earlier in the process

While we test migrations, nginx can serve random hosts to the ELB and
begin serving traffic before lms/cms have linked in and been started by
supervisor.

This should restore the previous behavior where /heartbeat would fail to
connect to the backend when supervisor isn't live yet.

Sometimes this task fails due to networking issues, but it shouldn't run
unconditionally anyway.

Add a static url base for LMS and CMS separately

We bumped past 50 ASGs

Allow nginx to be templated but not enabled

You can set MaxRecords to 100 but this will just fail again when we get
there.  botocore has a builtin paginator for most API calls, so I just
wrapped that up and appended to matching_groups.

If you set nginx_skip_enable_sites it will not symlink the items in
nginx_sites.  This means you have to make that change later.  EdX does
it with our pre_supervisor script, the same code that checks on
migrations being complete and also symlinks in supervisor processes to
run.

Remove the TODO: remove task for minos.
We stopped creating all the per-service dirs in edx_service

Minos' default config lives in /edx/etc

Four years ago we moved it there and left a symlink behind, but this
playbook wasn't updated.  Now that we've cleaned up the symlink, minos
fails to run on new machines.

https://github.com/edx/configuration/pull/1882

When this merges, it will break non-test builds
https://github.com/edx/configuration/pull/4598/

Make the notes docker image use devstack settings by default

* Remove edx-east folder, replace with symlink.

Stop having edxapp: for edxapp:lms edxapp:cms

This is the status quo for all other IDAs, and also this is required for
our current devstack tooling which just assumes the default settings are
for devstack.

As we move to deploying cms and lms separately, we don't need a group.
Having the group specified in each lms.conf cms.conf supervisor config
doesn't work on sandboxes, so I just cleaned up everything that uses
them on sandboxes.

Ensure that edxapp.conf isn't still deployed