gateway_balances response is different from rippled when hot wallet account format is invalid 

Code snippet from rippled:
https://github.com/XRPLF/rippled/blob/develop/src/xrpld/rpc/handlers/GatewayBalances.cpp#L129

rippled returns `rpcINVALID_HOTWALLET` if api_version is 1, returns `rpcINVALID_PARAMS` if api_version is larger than 1.

Clio returns `rpcINVALID_PARAMS` regardless the api_version value.
