Bug 10535: (follow-up) add test case

This adds a test case for the new default sort
order for GetBudgets().

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 10535: (follow-up) wrap Budgets.t in transaction

This patch also temporarily removes any existing
budgets to avoid issues where tests can fail if there
is already an active budget in the database.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>