This change reduces the number of stats dumped as json in traffic_gen tests. Change-Id: I94becb2e6d5da6096271cf7893ff2b380314da06 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/71402 Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com>