NCBC-231: implement GetL operations

Change-Id: Ied68e8c42e42b60d9d9cc68bb7996ddd7b99fafa
Reviewed-on: http://review.couchbase.org/25216
Tested-by: John C. Zablocki <john@couchbase.com>
Tested-by: Saakshi Manocha <saakshi.manocha@globallogic.com>
Reviewed-by: Saakshi Manocha <saakshi.manocha@globallogic.com>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>