Checkmk Werk 15598: group_config: deleting a non-existing group no longer has a 400 response

ID: 15598 Title: group_config: deleting a non-existing group no longer has a 400 response Component: REST API Level: 1 Class: Bug fix Version: 2.3.0b1 This werk introduces a fix to the contact_group, host_group and service_group endpoints. Previously when deleting an object or bulk deleting a list of objects, the rest-api would respond with a 400 status code when the group didn't exist. We now respond with a 404 Not Found.