cli: use GetWalletBalances() functionality for -getinfo
cli: use GetWalletBalances() functionality for -getinfo

and replace GetBoolArg with IsArgSet as we only want
to know if the arg is passed; we do not need the value.


Former-commit-id: 30985d9864d70f0351932f1ee28e4bfe98c19100
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin