Changes to Get all crack spreads

added the optional property data/spreads/items/data_stale to the response with the 200 status

added the optional property data/spreads/items/stale_warning to the response with the 200 status

added the media type application/json for the response with the status 200

added the media type application/json for the response with the status 401

added the non-success response with the status 400

added the non-success response with the status 500