Bug 10817: return hold items info in SIP Patron Info Response

Bug 10817: return hold items info in SIP Patron Info Response

When requested by the summary flags the sipserver
should return in the patron info response barcodes of
the relevant titles.

For available holds this is the barcode of the captured items.

For unavailable holds ( i.e. current unsatisfied holds ),
we need to send a barcode so that the unit can use this to
request the title info. The barcode could be any one
belonging to the title.

This patch also corrects the erroneous return of empty items
in the patron information response. If the unit supplies a
range 1 - 100 unless the title has a hundred or more copies the
unit expects all copies. The server was erroneously stuffing
the returned arrays with null copies so that all summary requests
returned 100 copies (mainly without barcodes)

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Testing notes:
Using the test script provided on the bug report, but changed it
to match sip user and patron existing in my database.

Before applying the patch the SIP responses show the behaviour
pointed out above regarding the 100 items. After applying the
patch and restarting the SIP server responses are much more clean
not returning empty IDs.

64 Patron information response
AS = hold items
  hold items count is correct.
  AS contains barcodes of waiting holds.
  Before patch, all AS were empty.
AT = overdue items
  overdue items count is correct.
  AT contains barcodes of overdue items.
AU = charged items
  charged items count is correct.
  AU contains barcodes of charged items.
AV = fine items
  Judging from behaviour seen and comment in
  Patrons.pm currently not implemented.
BU = recall items
  Recalls are not implemented in Koha yet.
CD = unavailable hold items
  unavailable items count is correct.
  CD contains barcode for item level holds and is empty
  for title level holds where  no item can be determined.
  Before patch, all CD were empty.

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