[honeybadger] resultMessage should return other thing

[AgwaB]

now

type ResultMessage struct {
	Epoch Epoch
	Batch map[Member][]byte
}

HoneyBadger get encrypted data and decrypt by tpke. And return transaction list or block.
we need to add additional logic to make transaction list or make block
maybe

type ResultMessage struct {
	Epoch Epoch
	Batch []Transaction
}

type ResultMessage struct {
	Epoch Epoch
	Block Block
}