Need more test in nonce handling

[acktsap]

Assume we commit 10 transaction with nonce 1 to 10.
What if transaction with nonce 3 fails?
Maybe following transaction using 4 to 10 would stay in mempool waiting for nonce 3 to be used.
Of course, this may be resolved if we request tx using nonce 3 successfully. But we need to handle those case in handling nonce.