Bug 14048: (QA followup) Default to 1 if no default rule
This patch answers Jonathan's request to simplify this patchset a bit.
It removes the need for the .sql file, as _default_rule now defaults to
a fixed value (1, which was set by the removed .sql file).
This allowed to remove the overloaded ->delete method.
The tests have been adjusted to reflect this changes, including tests for
the new 'default'-if-absent situation.
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Jesse Weaver <jweaver@bywatersolutions.com>