Use keywords search for UDPs search

has added the new keywords search to /usage-data-providers queries.

It is a single database index that covers label, description, aggregator name.

Covering the description is new.

Combinging all three into a single database index is faster because it’s only one search index and because the query optimizier can better predict the outcome resulting in a better (=faster) query plan.

Use a CQL query like keywords all "foo*" to make use of it.