function_score: match only document with score above custom score thresh...

...old

functon_score matched each document regardless of the computed score.
This commit adds a query parameter `min_score` (-Float.MAX_VALUE default).
Documents that have a score lower than this threshold will not be mached.

closes #6952
Can this be:
docs.add(client().prepareIndex(INDEX, TYPE, Integer.toString(i)).setSource("num", i + scoreOffset))?