public Vote vote(SimpleString handler,Vote vote){
  QuorumVoteHandler quorumVoteHandler=handlers.get(handler);
  return quorumVoteHandler.vote(vote);
}

public Vote vote ( SimpleString handler , Vote vote ) { QuorumVoteHandler quorumVoteHandler = handlers . get ( handler ) ; return quorumVoteHandler . vote ( vote ) ; }
handle a vote received on the quorum
