lengthen test to generate response time data to ES

[bengland2]

must be longer than 1 second to insert into ripsaw-smallfile-rsptimes index
This fixes a problem noticed in snafu PR 99.
Please mark OK TO TEST and merge ASAP.

[aakarshg]

/rerun all

[rht-perf-ci]

Results for minikube_jjb

Test	Result	Retries	Duration (HH:MM:SS)
test_backpack	Pass	1	00:02:00
test_ycsb	Pass	0	00:02:27
test_fiod	Pass	0	00:04:22
test_fs_drift	Pass	0	00:02:04
test_smallfile	Pass	0	00:03:16
test_pgbench	Pass	0	00:02:51
test_iperf3	Pass	0	00:03:10
test_sysbench	Pass	0	00:02:05
test_uperf	Pass	0	00:05:28
test_byowl	Pass	0	00:01:42
test_hammerdb	Pass	0	00:02:27

[rht-perf-ci]

Results for kni_jjb

Test	Result	Retries	Duration (HH:MM:SS)
test_backpack	Pass	2	00:10:44
test_ycsb	Pass	0	00:09:37
test_fiod	Pass	0	00:08:02
test_fs_drift	Pass	0	00:02:45
test_smallfile	Pass	0	00:03:55
test_pgbench	Pass	0	00:03:25
test_iperf3	Pass	0	00:03:57
test_sysbench	Pass	0	00:02:32
test_uperf	Pass	0	00:07:54
test_byowl	Pass	0	00:03:23
test_hammerdb	Pass	0	00:04:47