Bug 15956: Rearranging some SIP unit tests

Bug 15956: Rearranging some SIP unit tests

The original SIP_ILS.t is split up into SIP/Patron.t and
SIP/Transaction.t.
The assumption on a hardcoded existing and non-existing card number is
replaced by adding and deleting a card number (:patron) with TestBuilder.

Test plan:
Run SIP/Patron.t
Run SIP/Transaction.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>