Race condition on transaction commit when using NuxeoRequestControllerFilter

In NuxeoRequestControllerFilter the transaction is committed only after chain.doFilter() has returned, but this call may stream information to a client that could act on it before the end of the stream and therefore before the end of the transaction, which means that a client could send a second request depending on the info it has received without the first request actually being committed.

This may occur when using Chemistry for a document creation, when the full document is refetched sometimes it's not seen.