Adjusting schema to match user_id definition in core
Adjusting schema to match user_id definition in core

Not including an update patch since the change has almost no practical
effect on existing installations.

Also fixing some whitespace issues.

Change-Id: If795591b18a385657a66a19068ea54b4b9c6523d

wikimedia/mediawiki-extensions-WikiLove,wikimedia/mediawiki-extensions-WikiLove