update incr 2i build logic to account for failed KV set calls
update incr 2i build logic to account for failed KV set calls

Change-Id: I126206e1e30be3a16e02e1c8c8a52acf15ea9e56
Reviewed-on: http://review.couchbase.org/52128
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>

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