Upgrade edxapp node version to 6.9 LTS

Remove partially implemented pip-accel code

Remove node ppa from jenkins-worker.

Removing ref to removed requirements file

Database parameter overrides for analytics.

Platform is now using nodeenv so we do not need node installed globally on
jenkins-workers.

Make AMQP vhost and TLS configurable for xqueue/celery

Remove code we no longer use.

Ensure that security updates are applied to developer devstacks

Add step to go-agent building - GitHub private key.

Add libffi-dev Ansible 2.x dependency.

update ecs go-agent tag name

Conditionally choose insights debian packages for precise and xenial.

Build the analytics_api from xenial.

Remove old / unlisted ssh keys

OPS-1925

Update other Vagrantfiles to be overridable like devstack

I moved this repo across organizations

add edxapp course import uploads bucket OPS-1894

Allow access to payment endpoint for payment processor POST back.

ECOM-6463: correct embargo URL

Allow workers to queue tasks across service variants

There's no such page as /embargo, it yields a 404.
/embargo/blocked-message/courseware/embargo/ is the correct URL.