FundAccount should wait for txn and confirm success

[banool]

The faucet returns a txn hash and the client must wait to see if it succeeds but FundAccount doesn't do that. The client can't wait themselves either easily because we just return ResponseInfo rather than a txn hash directly. FundAccount should use the functions to wait for the txn.

The impact of this is sometimes the SimpleNftExample fails, as will anything else that uses the faucet.

[kPatch]

Good catch. Let me push this in develop.