Should set author in commit metadata

[Alexandre Garnier]

It would be nice to have sender info stored in author field of merge commit.

For mail queue the script.getSender() can be taken as is (the from field of the email)
For LP queue the script.getSender() could be redifined as "self.merge_proposal.queuer.display_name <self.merge_proposal.queuer.confirmed_email_addresses_collection[0].email>" (or something like that)

And then the sender could be use as author in the commit command ("tree.commit(summary, author=sender, verbose=False)" in Bazaar2Handler for example)

[Robert Collins (lifeless)]

I think this might be a duplicate; anyhow - it would be a little weird to do this, because bzr already knows who made the changes - bzr log and bzr annotate should /already/ be showing correct information.