Adding BsonDocument constructor that allocates an LinkedHashMap with known capacity
Adding BsonDocument constructor that allocates an LinkedHashMap with known capacity

JAVA-3613

Signed-off-by: Gaspard Petit <36137f3ac6d9a611ab19d90b9123da43528ef168@eidosmontreal.com>
Co-authored-by: Jeff Yemin <6fef972ae128f1136b08bf590340a91c93d78db5@mongodb.com>

jyemin/mongo-java-driver,rozza/mongo-java-driver,rozza/mongo-java-driver,jyemin/mongo-java-driver