Store LastConsensusHash in State as well

Update all BlockValidation that it matches the last state

consensus/state.go

@@ -866,7 +866,7 @@ func (cs *ConsensusState) createProposalBlock() (block *types.Block, blockParts
 	return types.MakeBlock(cs.Height, cs.state.ChainID, txs,
 		cs.state.LastBlockTotalTx, commit,
 		cs.state.LastBlockID, cs.state.Validators.Hash(),
-		cs.state.AppHash, cs.state.Params.Hash(),
+		cs.state.AppHash, cs.state.LastConsensusHash,
 		cs.state.Params.BlockPartSizeBytes)
 }