Bug 14598: (QA followup) use deleted{items|biblioitems} during upgrade

Bug 14598: (QA followup) use deleted{items|biblioitems} during upgrade

If the 'statistics' table contains circulation information about items
that are no longer on the DB it will raise a warning. This patch
makes the updatedatabase.pl script use the deleteditems and deletedbiblioitems
tables to get information for those items on the statistics table.

To reproduce:
- Have your sample DB contain some circulation data on the statistics table
- Make sure some of them have NULL itemtype:
> UPDATE statistics SET itemtype = NULL WHERE type='return';
- Check the upgrade query catches them:
> SELECT s.itemnumber, i.itype, b.itemtype FROM  ( SELECT DISTINCT itemnumber    FROM statistics    WHERE ( type = "return" OR type = "localuse" ) AND itemtype IS NULL ) s  LEFT JOIN  ( SELECT itemnumber,biblionumber, itype      FROM items    UNION    SELECT itemnumber,biblionumber, itype      FROM deleteditems ) i  ON (s.itemnumber=i.itemnumber)  LEFT JOIN  ( SELECT biblionumber, itemtype      FROM biblioitems    UNION    SELECT biblionumber, itemtype      FROM deletedbiblioitems ) b  ON (i.biblionumber=b.biblionumber);
+------------+-------+----------+
| itemnumber | itype | itemtype |
+------------+-------+----------+
|        732 | BK    | BK       |
|        731 | BK    | BK       |
+------------+-------+----------+
2 rows in set (0.00 sec)

- Delete the items, and some biblio too.
- Re-run the query
=> SUCCESS: Same results
- Go reset to NULL the itemtypes
> UPDATE statistics SET itemtype = NULL WHERE type='return';
- Run the updatedatabase.pl script:
 $ sudo koha-shell koahdev ; cd kohaclone
 $ perl installer/data/mysql/updatedatabase.pl
=> SUCCESS: No warnings

Note: It is possible that on production sites, if the sysadmin is cleaning the
deleted{items|biblioitems|biblio} tables, there will be warnings. This is expected
as they need to know some data lacks information.

Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Mason James <mtj@kohaaloha.com>