Reworks eth send raw transaction flow with qtum utxos

[IntegralTeam]

Revisions Ethereum send raw transaction method:

• pkg/eth/rpc_types.go: add SendRawTransactionRequest and SendRawTransactionResponse types;
• pkg/qtum/rpc_types.go: add SendRawTransactionRequest and SendRawTransactionResposne types;
• pkg/qtum/method.go: add Method.SendRawTransaction();
• pkg/transformer/eth_sendRawTransaction.go: revision ProxyETHSendRawTransaction.Request().Implements get qtum UTXOs RPC proxy:
• pkg/eth/rpc_types.go: add GetUTXOsRequest{};
• pkg/transformer/util.go: add convertETHAddress() and convertQtumAddress();
• pkg/qtum/rpc_types.go: actualize ListUnspentRequest{}, ListUnspentResponse{}; add ListUnspentQueryOptions{};
• pkg/transformer/qtum_getUTXOs.go: add ProxyQTUMGetUTXOs{};
• pkg/transformer/transformer.go: add ProxyQTUMGetUTXOs{} to DefaultProxies().

[VoR0220]

Lets get a couple more tests in here. see these notes for some good test cases that I would want to ensure converted. https://github.com/hayeah/openzeppelin-solidity/blob/qtum/QTUM-NOTES.md

[IntegralTeam]

• The issue is solved. Please, see commit hash ac69fa5