changing the name makes it easier to distinguish which cloud I am checking when using ssh to directly check `systemctl`, `journalctl`, `etcdctl`, etc in multiple clouds (fleets)  -- example: `asterix-01`, `asterix-02`, .. `asterix-nn` are all using a common discovery key - sharing an `etcd` and `fleetctl` submissions -- `obelix-01`, `obelix-02`, ... are in a different cloud (fleet) using a different discovery key -- the only difference during initialization is the discovery key in `user-data` and the configuration in `config.rb` (including `$name_base`), otherwise the two fleets use the same `Vagrantfile` (and `override-plugin.rb`) -- when using ssh to access a fleet machine, the prompt `core@asterix-01 ~ $` reminds me which cloud I am checking