Set field boosts to match RS PROD (fixes #7742)

A user reported that queries containing parentheses around boolean subqueries stopped working, such as `argonne AND ("world war, 1914-1918" OR "world war I" OR "great war")`. I noticed that there was a mismatch between the production configuration in the old Rackspace environment and what was in the platform repo (and, subsequently, what we deployed on AWS).

See also dpla/platform#31.