[pkg] prepare 3.17.2

repository: make tests pass again The tests use mono-threaded pyro, which breaks assumptions made in e27337dfec8c. To fix that, remove sessions from the _pyro_sessions dict when they're closed, and force the test pyro client to actually disconnect when it's done.

repository: monkey patch pyro connection handling to detect clients going away When a pyro client goes away we need to close their session (to release their cnxset). Add a dict to the repository mapping pyro client threads to session object. Closes #2932058

notification: use viewargs for notif_entity_updated instead of transaction_data Now that notifications use separate sessions, they can't rely on the original transaction_data being around, so pass the data through view arguments instead, so the notification view knows what changed on updated entities. Closes #2936180