Fix Orchid not sorting by relevance by default
Fix Orchid not sorting by relevance by default

Sort parameter is being set from config.yml upon $api request object
creation, so the API always receives a sort parameter and doesn't
run its code to use _score if no sort parameter present

Handle the absence of a user-selected sort parameter to retain config
value for default sort field when no query string received

CDRH/orchid,CDRH/orchid,CDRH/orchid