Deleting a non-existing endpoint from notifications/defaults always results in 200 response code.

example:

https://qa.cloud.redhat.com/api/notifications/v1.0/notifications/defaults/31d41c73-1246-4a0d-b1e8-4e828fc7f111

Expected: return 404 not found error code

Side note: successful delete operation needs to result in 204 return code and not 200