Bug 23486: Add creation to TrackLasPatronActivity triggers

Bug 23486: Add creation to TrackLasPatronActivity triggers

Some libraries would like to update the last seen when a patron is created to avoid NULL
values and ensure new users are marked as 'active'

To test:
1 - Apply patch
2 - Create a new patron, confirm their lastseen date is null
    SELECT lastseen FROM borrowers WHERE cardnumber={their cardnumber}
3 - Update preference 'TrackLastPatronActivity' to include 'Patron creation'
4 - Create a second patron, confirm their lastseen is set
5 - Update preference 'TrackLastPatronActivity' to include 'Checking out an item'
6 - Checkout an item to the second patron
7 - Confirm their lastseen is not updated (We only update once per day)

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>