Remove specification of machine names in KayVee/libraft cluster configuration

[allengeorge]

Currently both the KayVee and libraft cluster configuration files require that you specify the names of all machines in the cluster. For example:

members:
    - id: SERVER_00
      kayVeeUrl: http://localhost:6080
      raftEndpoint: localhost:9080
    - id: SERVER_01
      kayVeeUrl: http://localhost:6085
      raftEndpoint: localhost:9085
    ...

This is unnecessary, especially now that each machine does a handshake in which it provides some identifying information.