Bug 10544: ensure that stocknumber searches work for MARC21

Bug 10544: ensure that stocknumber searches work for MARC21

Bug 6256 replaced in bib1.att stocknumber by Number-local-acquisition
for number 1062.

In this case, Number-local-acquisition must be used in record.abs and
stocknumber can be an alias of it in ccl.properties.

Test plan (for MARC21/GRS1):
- drop zebra database (rebuild_zebra.pl -r ...)
- reindex
- test in simple search : ccl=Number-local-acquisition,alwaysmatches=''
=> you get all records with a stocknumber
- test in simple search : ccl=stocknumber,alwaysmatches=''
=> you get the same results

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>