now adds hosts by name instead of UUID

This adds the Host VMs by name instead of UUID, which is a lot cleaner.
Alright. Well, the UUIDs that virt-who provides don't seem to match the UUIDs in VMware (fetched with 'esxcli system uuid get'), and anyway there doesn't seem to be a way to mass-rename them once they get into the satellite. Having just the UUIDs is completely unmanageable if you have a complex vSphere :/