Bug 15705: Notify the user on auto renewing

Bug 15705: Notify the user on auto renewing

When an issue is auto renewed, a notice will be sent to the patron.
The notice will tell if the renewed has been successfully done.

Note that this patch is not ready to be pushed yet, as it has some
defects:
- 1 notice per issue
- no way to disable the notice generation
- no way to specify patron categories to enable/disable the
  notifications

Test plan:
Use the automatic_renewals.pl script to auto renew issues.
If the auto renew has failed or succeeded, a notice will be generated in the
message_queue table.
If the error is "too_soon" or is the same as the previous error, the
notice won't be generated (we do not want to spam the patron).

Signed-off-by: Janet McGowan <janet.mcgowan@ptfs-europe.com>
Signed-off-by: Jonathan Field <jonathan.field@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>