message: Fix contract rpc calls DGP height
diff: @@ -446,8 +446,8 @@ UniValue createcontract(const JSONRPCRequest& request){
  return NullUniValue;
  QtumDGP qtumDGP(globalState.get(), fGettingValuesDGP);
  - uint64_t blockGasLimit = qtumDGP.getBlockGasLimit(chainActive.Height()+1);
  - uint64_t minGasPrice = CAmount(qtumDGP.getMinGasPrice(chainActive.Height()+1));
  + uint64_t blockGasLimit = qtumDGP.getBlockGasLimit(chainActive.Height());
  + uint64_t minGasPrice = CAmount(qtumDGP.getMinGasPrice(chainActive.Height()));
  CAmount nGasPrice = (minGasPrice>DEFAULT_GAS_PRICE)?minGasPrice:DEFAULT_GAS_PRICE;
  if (request.fHelp || request.params.size() < 1 || request.params.size() > 5)
  @@ -633,8 +633,8 @@ UniValue sendtocontract(const JSONRPCRequest& request){
  return NullUniValue;
  QtumDGP qtumDGP(globalState.get(), fGettingValuesDGP);
  - uint64_t blockGasLimit = qtumDGP.getBlockGasLimit(chainActive.Height()+1);
  - uint64_t minGasPrice = CAmount(qtumDGP.getMinGasPrice(chainActive.Height()+1));
  + uint64_t blockGasLimit = qtumDGP.getBlockGasLimit(chainActive.Height());
  + uint64_t minGasPrice = CAmount(qtumDGP.getMinGasPrice(chainActive.Height()));
  CAmount nGasPrice = (minGasPrice>DEFAULT_GAS_PRICE)?minGasPrice:DEFAULT_GAS_PRICE;
  if (request.fHelp || request.params.size() < 2 || request.params.size() > 7)
  