Bug 14197: TestBuilder - Remove the error on starting the transaction

Bug 14197: TestBuilder - Remove the error on starting the transaction

DBD::mysql::db begin_work failed: Already in a transaction at /usr/share/perl5/DBIx/Class/Storage/DBI.pm line 1560.
DBIx::Class::Storage::DBI::txn_rollback(): Storage transaction_depth 0 does not match false AutoCommit of DBI::db=HASH(0xa429648), attempting ROLLBACK anyway at t/lib/TestBuilder.pm line 363

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>