message: test: Pass empty tx pool to block assembler
diff: @@ -216,10 +216,10 @@ TestChain100Setup::TestChain100Setup()
  CBlock TestChain100Setup::CreateAndProcessBlock(const std::vector<CMutableTransaction>& txns, const CScript& scriptPubKey)
  {
  const CChainParams& chainparams = Params();
  - CBlock block = BlockAssembler(*m_node.mempool, chainparams).CreateNewBlock(scriptPubKey)->block;
  + CTxMemPool empty_pool;
  + CBlock block = BlockAssembler(empty_pool, chainparams).CreateNewBlock(scriptPubKey)->block;
  - // Replace mempool-selected txns with just coinbase plus passed-in txns:
  - block.vtx.resize(1);
  + Assert(block.vtx.size() == 1);
  for (const CMutableTransaction& tx : txns) {
  block.vtx.push_back(MakeTransactionRef(tx));
  }
  