Add benchmark for ku-latency

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Mel Gorman <mgorman@suse.de>
ku-latency: Add dedicated config

Dedicated until it is determined if it should be part of the network
tests.

Signed-off-by: Mel Gorman <mgorman@suse.de>
postgresbuild: Configuration file tighening ups

Signed-off-by: Mel Gorman <mgorman@suse.de>
ku-latency: Report quartiles as data has massive outliers

Signed-off-by: Mel Gorman <mgorman@suse.de>