Bug 10575 : GetOrdersByBiblionumber.t needs a database transaction

Bug 10575 : GetOrdersByBiblionumber.t needs a database transaction

Before this patch, the queries in GetOrdersByBiblionumber.t were commited in the database and have to be removed at the end.
This patch wraps tests in a database transaction.

Test Plan :
prove t/db_dependent/Acquisition/GetOrdersByBiblionumber.t
t/db_dependent/Acquisition/GetOrdersByBiblionumber.t .. ok
All tests successful.
Files=1, Tests=3,  0 wallclock secs ( 0.02 usr  0.01 sys +  0.37 cusr  0.05 csys =  0.45 CPU)
Result: PASS

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Tests pass.
Signed-off-by: Galen Charlton <gmc@esilibrary.com>