Loadtesting branch rebase (attempt #2)

:construction: WIP
This branch does have some value, now that we're past CS12 I'd like to propose merging it in.   Cool things it does:

* supports an EBS volume for standalone and tier topology, so we can safely run the drbd recipe on those now
* enables fog_helper to be accessed from the machines directly, they can pass in credentials
* Adds ELB support
* finally refactors to use yum 3.0 style recipes and friends

Thanks to @ryancragun for a proper rebase :)