CBQE - Add support for larger_is_better check
CBQE - Add support for larger_is_better check

Change-Id: I5fb9186f39b427975f136041aa1a4f0ef026d721
Reviewed-on: http://review.couchbase.org/63428
Reviewed-by: Ketaki Gangal <a5dce29d82b35a7c3450ec2c8589d08111573475@couchbase.com>
Tested-by: Ketaki Gangal <a5dce29d82b35a7c3450ec2c8589d08111573475@couchbase.com>

couchbase/perfrunner,pavel-paulau/perfrunner,EricACooper/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,EricACooper/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,pavel-paulau/perfrunner,EricACooper/perfrunner