SERVER-14460 Comment out implementation of checkReplicaMemberVersions for now
SERVER-14436 Introduce bsonCheckOnlyHasFields helpers.

These helpers paired with the bsonExtract helpers faciliate the manual parsing
of structures out of BSONObj.
SERVER-14299 prevent mongos from requesting unnecessary batches for sort + limit queries
SERVER-14460 Fix lint
Merge remote-tracking branch 'upstream/master'