Bug 1046815: Update mozharness configs

This almost re-syncs our mozharness config files with the "real" ones in mozharness. The remaining differences are a few references to /tools; I am trying to sort out those differences with Release Engineering, but that may take some time.
> Anyways, what we should do is document where artifacts to be uploaded are stored within the docker container when it shutsdown. 

This is the first step... I liked moving everything into a single "artifacts" folder so it was easier to see everything from inside the container but this is just my preference.