Add parsing to "unique for namespace/category/concept"

The Parsing with paremeter "values=" works well, but it doesn't
for parameters "unique for category", "unique for namespace" or
"unique for concept".
They didn't have parsing at all, so we need to add parsing function
for them.

Bug: T246715
Change-Id: I33abae4d71ef46b1d15316e8a32a4d074e3a205c