[Templates] CoreOS: Push a mounted config drive with Vagrant's insecure pubkey so that we can SSH into the machine for now. @todo Needs a robust way to override the keys by the user and recreate the ISO image on the fly.
Build script for CoreOS' configdrive ISO (requires mkisofs available in cdrtools)
[Data] CoreOS: Added a default user_data config with Vagrant's insecure pubkey and a bundled configdrive image containing said default user_data file.