Lock down the staging load balancer

This runs a quick Python script to apply the `ip_access.yml` IP whitelist to the staging load balancer.
> Should we put this in a transaction that rolls back on failure in case the access list wasn't formatted right?

This was a quick and dirty thing to get the access list pushed out there properly. The Real Solution :tm: is to add proper, idempotent `access_list:` support to the `rax_clb` module in Ansible.

You're certainly welcome to make it a bit safer if you feel so inclined!