Invalid parameters in the distributable-web-local feature group

The distributable-web-local feature group's "subsystem.distributable-web.routing.local" feature-spec includes a couple paramters that map to non-existent attributes in the management resource.

This feature group is currently unused, which is why this hasn't been detected. But current work like WFLY-14218 and perhaps WFLY-13150 will soon change that.