Problem: no command to patch the duplicated tx situation

[yihuang]

The patch logic like this should work:

for blockResult in blockResults:
    for txResult in blockResult.TxDeliverResponses:
        if txResult.code != txIndexer.get(txResult.txHash).code:
            if txResult.code == 0:
                # a success tx is overridden by a failure result, override the indexes by reindex the result
                txIndexer.Index(txResult)