Bug 16122: Add unit test

Bug 16122: Add unit test

To test:
1. Apply patch, updatedatabase & schema, restart all Services
2. Go to Administration > Table setting. Find the holdings table ( Catalog > holdings_table ) and turn the local use column on.
3. Go to an item record and notice the column 'Local uses'
4. Turn the system preference RecordLocalUseOnReturn Off.
5. Check in an item that is not checkout out. No local use should be recorded for the item.
6. Turn RecordLocalUseOnReturn on and check in an item that is not checked out. Local use on that item should increment by 1.
7. Create a statistical patron and check an item out to them. Local use should increment by 1.
8. Go to /api/v1/items?external_id={barcode} and make sure the numbers for localuse look correct.

To test maintainence script:
1. Without the patch, have RecordLocalUseOnReturn on.
2. Check in some items to record localuse in the stats table. Keep note of those stats.
3. Apply the patches, updatedatabase.
4. Run the maintenance script, perl update_localuse_from_statistics.pl
5. Now check that items.localuse is congruent with what is in the stats table

Signed-off-by: Andrew Fuerste Henry <andrewfh@dubcolib.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>