Without the `apt-get update`, the apt cache is out of date while attempting to install
rabbitmq. An older version from the Ubuntu repo is installed instead of the one from
the rabbit repository, which makes the role fail later on with:

```
TASK: [rabbitmq | install plugins] ********************************************
[...]
failed: [10.145.2.22] => {"failed": true, "item": ""}
msg: Failed to find required executable rabbitmq-plugins
```

nginx configuration for long site names

Set carnegie local relative to carnegie secure, so we have to get the
prefixes right once only.

Update to use the new commit variable.

collectstatic cleanup

rake gather_assets replaces collectstatic
so all references and logic to handle both
are removed

removes collect_static.yml since now there are
only two tasks for rake gather_assets.

support ansible 1.3

These are some minimal changes to support 1.3, does not yet include role
dependencies.

sandbox-ora: Include xqueue & ORA on the `edx_sandbox` playbook

Feanil/update vpc tools

The previous one did not work so updating it with a copy from production.

They have their own LMS DB.

If the nginx play is called with the nginx_conf varialble, then expect
to find in {{secure_dir}}/files/nginx.conf and copy it over.  If not set
then the default one already there will be sufficient.

One comes with the standard installation, overwrite with our own,
provided in {{secure_dir}}/files.