LP2030915: Restrain creation of AutorenewNotify events

LP2030915: Restrain creation of AutorenewNotify events

Using a connected open-ils.trigger session to create AutorenewNotify
events without gathering the results can overwhelm the
open-ils.trigger drones leading to errors while processing the
Autorenew events. These errors may cascade causing additional
Autorenew events to error.

By switching from calling request() on a connected open-ils.trigger
session to using the simplereq() function from AppUtils, we cause the
event creation code to 1) gather the results, thus waiting on the call
to finish before making another, and 2) make a new connection to
open-ils.trigger for each AutorenewNotify event creation. The latter
leads to fewer drones being used and avoids a case where a connected
drone may disappear without notifying the connected client.

Co-authored-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Jason Stephenson <jason@sigio.com>
Signed-off-by: Galen Charlton <gmc@equinoxOLI.org>