Bug 29557: Add auto_account_expired to AUTO_RENEWALS

Bug 29557: Add auto_account_expired to AUTO_RENEWALS

It was missing and the notice sent was not providing the reason of the
failure.

Test plan:
Check an item out with a date in the past, mark it as auto renew
Modify the expired date of the patron and set it in the past
Run the automatic_renewals.pl cronjob script, confirm that the notice
now contains the reason of the failure.

QA note: The template will be updated only for English installations.
Should we add an alert for others?

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>