Changed our nested query search logic to use straight-up edismax.

Ho-ly crap that was easy. THAT'S WHY WE REFACTOR STUFF EVERYBODY. THANK YOU AND GOOD NIGHT.
added in query fields for actors, genres, etc
removed boost query string and boost functions
Merge branch 'dev' into improved-videosearch
introduce VET query service apart from Video search
Merge branch 'dev' into improved-videosearch
updated unit test
Merge pull request #750 from Wikia/improved-videosearch

Improved videosearch