CBQE-1531: add limit offset tests

Change-Id: Iad138df07c8d78e5e2fdcab0456d67b2fdb236c4
Reviewed-on: http://review.couchbase.org/29331
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>