[GSI] functional 2i test TestDeleteDocsMutation failed on toy build with actual and expected count mismatch

=== RUN TestDeleteDocsMutation
2016/03/03 01:37:09 In TestDeleteDocsMutation()
2016/03/03 01:37:09 Index found: index_age
2016/03/03 01:37:10 PERFSTAT Range 0.2962 seconds
2016/03/03 01:37:10 Len of expected and actual scan results are : 10602 and 10602
2016/03/03 01:37:10 Expected and Actual scan responses are the same
2016/03/03 01:37:11 PERFSTAT Range 0.4429 seconds
2016/03/03 01:37:11 Index Scan after mutations took 540.715962ms
2016/03/03 01:37:11 Len of expected and actual scan results are : 10402 and 10403
2016/03/03 01:37:11 Expected scan count 10402 does not match actual scan count 10403
— FAIL: TestDeleteDocsMutation (1.25s)
common_test.go:90: Error in scan result validation: Expected scan count 10402 does not match actual scan count 10403

Testrunner log: http://qa.sc.couchbase.com/job/cen006-nserv-vset01-functional2itests/350/consoleFull