Better display of transactions' results

[grarco]

We should rework the display_batch_resp function that we use to print the result of a transaction to account for a couple of things.

1. In case of an out-of-gas error we stille log the gas used at the batch level: this is misleading since we stop executing the tx as soon as it goes past the limit. Therefore, the resulting gas that we log is just the point where we stopped, not the actual gas required to run the transaction to completion, but logging it like this might trick users into thinking that.
2. We are currently not including the ResultCode of the batch in the message we display. This is useful in cases of a failing atomic batch for example, since the single inner transactions inside of it could be successful but the state changes they imply would end up being discarded