Cake3 ApiListener Exception Fix

Fixes #228 
While this sets the exceptionrenderer to required value all other error related setting will be set to default. Ideally we would want all setting except the renderer class to be same as those set in `app.php`. But since the `Error` config is consumed in `bootsrap.php` it's no longer available. So a patch would be necessary for the skeleton app too to simply read the `Error` config instead of consuming it.