Almost any use of packet was to retreive the msg_id of the request and pass it to answer().
In storage's replicator, critical TIDs are indexed with UUID instead of remote connection ID (full replicator review required).
In admin node, expected answers are still queued with the msg_id but it seems useless as no concurrent queries should happen.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1569 71dcc9de-d417-0410-9af5-da40c76e7ee4