Bug 14868: Swagger2-driven Permission checking

Bug 14868: Swagger2-driven Permission checking

Define 'x-koha-permission' for the Swagger2 Operation Object, to automatically
authorize against the required permissions.

This way we immediately tell the API consumer in the Swagger2-definition, which
permissions are needed to access defined resources.
Also we don't need to maintain permissions in multiple locations and we can build
a smart testing framework to help a lot in creating tests for the new REST API.

Signed-off-by: Benjamin Rokseth <benjamin.rokseth@kul.oslo.kommune.no>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>