minor fix for new fts data spread worker
minor fix for new fts data spread worker

Change-Id: Ie89cb801f22ebbe31d5d744982e92c0f5c6f9f8a
Reviewed-on: http://review.couchbase.org/c/perfrunner/+/144997
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: <7c5437523872fffef04ef9d4aaffcc0ca27fba16@gmail.com>

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