fix typo in notification causing NameError introduced by: f5b40b66d36e

[test/notification] merge related test classe They have no reason to be distinct.

merge with stable

[server] add a looping task to free unused cnxsets capture by dead pyro When a pyro client disconnects, we're not necessarily notified so they can hang on to their session/cnxset forever. Don't let them do that. The hacky looping task is only installed when pyro is enabled. This optional activation save this very hacky patch from being rejected. closes #2825380