Bug 17733: Fix Members.t

Bug 17733: Fix Members.t

In some dirty DB (Jenkins), the borrowers.guarantorid field is not set
to a valid patron id.
That make some tests fail if we create a patron with that patron id.

In my DB, auto increment for borrowers is set to 52 before the tests
On the 4th run of the tests, some tests fail.
Before I got a patron with a guarantorid=112 (I let you do the math).

Test plan:
The easiest is to trust me

Todo: Add a FK!
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Opened a new report for special case: Bug 17759.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>