Bug 6331: (follow-up) update timestamp when deleting items

Bug 6331: (follow-up) update timestamp when deleting items

When item is transfered from items table to deleted items, all fields
must be copies but "timestamp".

This value must be updated to know when the item was deleted.

Test plan:
- Look a an item timestamp :
mysql> select timestamp from items where itemnumber = 2690;
+---------------------+
| timestamp           |
+---------------------+
| 2011-09-09 15:30:21 |
+---------------------+
1 row in set (0.00 sec)
- Delete this item in cataloguing module
- Check it is not in items table anymore :
mysql> select timestamp from items where itemnumber = 2690;
Empty set (0.00 sec)
- Look in deleteditems table :
mysql> select timestamp from deleteditems where itemnumber = 2690;
+---------------------+
| timestamp           |
+---------------------+
| 2013-12-05 15:33:20 |
+---------------------+
1 row in set (0.00 sec)
=> timestamp as been set to actual date/time

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Patch set passes koha-qa.pl, works as advertised!

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit cada676ef3439d2567fa21da415d939f0fc22ee6)
Signed-off-by: Fridolin SOMERS <fridolin.somers@biblibre.com>