fix numindexes in scan latency tests
fix numindexes in scan latency tests

Change-Id: I48cd5ac043eb21ce6279e469b544ce38ce00d9c3
Reviewed-on: http://review.couchbase.org/52037
Reviewed-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>

mikewied/perfrunner,couchbase/perfrunner,EricACooper/perfrunner,thomas-couchbase/perfrunner,PaintScratcher/perfrunner,dkao-cb/perfrunner,thomas-couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,vmx/perfrunner,pavel-paulau/perfrunner,EricACooper/perfrunner,dkao-cb/perfrunner,pavel-paulau/perfrunner,vmx/perfrunner,EricACooper/perfrunner,couchbase/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,mikewied/perfrunner,pavel-paulau/perfrunner,PaintScratcher/perfrunner,pavel-paulau/perfrunner,EricACooper/perfrunner