Changes to GET /api/news/bulletins

api path removed without deprecation

endpoint added

added the non-success response with the status 404

added the optional property items/isPublished to the response with the 200 status

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 405

added the non-success response with the status 406

added the non-success response with the status 415

added the non-success response with the status 500