Added MasterActorResponsiveness_BENCHMARK_Test.
Added MasterActorResponsiveness_BENCHMARK_Test.

See summary.

Review: https://reviews.apache.org/r/68131/

jpeach/mesos,reneploetz/mesos,Gilbert88/mesos,dforsyth/mesos,abudnik/mesos,abudnik/mesos,chhsia0/mesos,dforsyth/mesos,reneploetz/mesos,kaysoky/mesos,abudnik/mesos,dforsyth/mesos,jpeach/mesos,chhsia0/mesos,gsantovena/mesos,reneploetz/mesos,reneploetz/mesos,reneploetz/mesos,kaysoky/mesos,Gilbert88/mesos,abudnik/mesos,jpeach/mesos,chhsia0/mesos,jpeach/mesos,jpeach/mesos,chhsia0/mesos,jpeach/mesos,gsantovena/mesos,gsantovena/mesos,abudnik/mesos,Gilbert88/mesos,kaysoky/mesos,kaysoky/mesos,dforsyth/mesos,chhsia0/mesos,gsantovena/mesos,abudnik/mesos,chhsia0/mesos,abudnik/mesos,chhsia0/mesos,reneploetz/mesos,gsantovena/mesos,Gilbert88/mesos,kaysoky/mesos,gsantovena/mesos,reneploetz/mesos,Gilbert88/mesos,dforsyth/mesos,dforsyth/mesos,kaysoky/mesos,Gilbert88/mesos,kaysoky/mesos,gsantovena/mesos,dforsyth/mesos,Gilbert88/mesos,jpeach/mesos