Revert "Use getblocktemplate instead of getrawmempool"
Revert "Use getblocktemplate instead of getrawmempool"

This reverts commit 577e599b5d2da9c191136bc41f2be0570397111c.

martindale/RelayNode,TheBlueMatt/RelayNode,danoctavian/RelayNode,danoctavian/RelayNode,martindale/RelayNode,BitcoinRelayNetwork/RelayNode,BitcoinRelayNetwork/RelayNode,TheBlueMatt/RelayNode,BitcoinRelayNetwork/RelayNode