CBQE-0: fix sum tests for tuq

Change-Id: I41ed3b01fd01c5622100b9d1f3ad12bbef9d2389
Reviewed-on: http://review.couchbase.org/34492
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>