CBPS-1037 random key for average compression
CBPS-1037 random key for average compression

Change-Id: Ib5a35baf2687c7a7aef8178e0b924bb7edf213fc
Reviewed-on: https://review.couchbase.org/c/perfrunner/+/177592
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: vikas chaudhary <c251871a64d7d31888eace0406cb3d4c419d5f73@couchbase.com>

couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner