Bug 10462: Some optimizations in Z3950 search paving the way for enhancements

Refactors Z3950Search.
Disable batch record counts for z3950 records.

Test plan:
Do various Z3950 searches on multiple targets from Cataloging and Acquisition.
Behavior should not have changed.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10462: Followup for showing multiple ISBNs in Z3950 response

As Jonathan correctly noted, the new Z3950 response only showed one isbn
although more isbn numbers could be in the record and would be imported.
To resolve this display problem, I traverse them all now in the updated
routine _isbn_show. There is no change in the imported records.
Note that before this patch TransformMarcToKoha did put all isbn numbers in
one field, separated by pipes (for display only). This behavior is restored
now. The three regexes on the individual isbn numbers now seem to be
overkill, but I left them there for completeness.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Tested this on a fresh French install under UNIMARC with BNF server.
Tested it too for MARC21.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10462: QA Followup to resolve LCCN mixup and remove hardcoded marc tags

This patch corrects the mixup for LC call number and control number.

Further, as suggested by Galen, it would be better to not introduce hardcoded
tags in the Z3950Search subs in Breeding.pm.
This patch resolves that by calling TransformMarcToKohaOneField.
Note that this only involves changes to _addrowdata and _isbn_show. These
subs are only used in building the displayed results table.

Additionally, for French UNIMARC installs publicationyear is used to fill
the Date column (copyrightdate is not used in those installs). The edition
statement is only used in unimarc_lecture_pub not in unimarc_complet.

Test plan:
Do some Z3950 searches and look for values in all result columns.
For MARC21 on LOC (and/or others):
  Look for isbn 9780415964845 (check LCCN).
  Look for author Rowling.
For UNIMARC on BNF2 (and/or others):
  On BNF2 look for isbn 2070518426: result contains date and multiple isbn's.
  Look for title: Guide des candidats aux emplois de commissaire de police.
  Third result show edition statement (if you use 205$a with pub install).
  Note that there are no results with LCCN here (just as before).

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Tested for MARC21 and UNIMARC (French lecture_pub install).

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10462: (follow-up) remove some undefined variable warning noise

Signed-off-by: Galen Charlton <gmc@esilibrary.com>