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>

etc/zebradb/ccl.properties

@@ -999,7 +999,8 @@ mc-loc location
 acqsource 1=8015
 coded-location-qualifier 1=8016
 price 1=8017
-stocknumber 1=1062
+Number-local-acquisition 1=1062
+stocknumber Number-local-acquisition
 inv stocknumber
 stack 1=8018
 issues 1=8019

etc/zebradb/marc_defs/marc21/biblios/record.abs

@@ -309,7 +309,7 @@ melm 952$e      acqsource
 melm 952$f      coded-location-qualifier
 melm 952$g      price
 #melm 952$h     
-melm 952$i      stocknumber
+melm 952$i      Number-local-acquisition
 melm 952$j      stack:n,stack:w
 #melm 952$k     
 melm 952$l      issues:n,issues:w,issues:s