Bug 6536: QA Follow-up: Add some unit tests for Z3950Search in Breeding.pm

Bug 6536: QA Follow-up: Add some unit tests for Z3950Search in Breeding.pm

This patch may serve as a starting point for more unit tests in this part
of the code.
In this patch most internal subroutines of Z3950Search are covered.
In the XSLT part we reuse a XSL template from the XSLT_Handler.t test.
It needed a little tweaking for namespaces. And added the indicators on
the 990 field.

Test plan:
Run both Breeding.t and XSLT_Handler.t.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>