jupblb: Add timeout to kubemark cleanup commands

JobBuild
e1eb9243
09-21 09:27		 9c8b0e86
09-21 09:23		 112623
09-21 09:23
pull-kubernetes-conformance-kind-ga-only-parallel 1572517718073020416 1572516913316106240
pull-kubernetes-conformance-kind-ipv6-parallel 1572517717691338752 1572516913060253696
pull-kubernetes-dependencies 1572517709562777600 1572516913093808128
pull-kubernetes-e2e-gce-100-performance 1572517724792295424 1572516913446129664
pull-kubernetes-e2e-gce-ubuntu-containerd 1572517711383105536 1572516913139945472
pull-kubernetes-e2e-kind 1572517715560632320 1572516913232220160
pull-kubernetes-e2e-kind-ipv6 1572517716403687424 1572516913265774592
pull-kubernetes-integration 1572517713065021440 1572516913181888512
pull-kubernetes-kubemark-e2e-gce-big 1572517865968373760
pull-kubernetes-node-e2e-containerd 1572517723961823232 1572516913387409408
pull-kubernetes-typecheck 1572517725639544832 1572516913890725888
pull-kubernetes-unit 1572517720191143936 1572516913345466368
pull-kubernetes-verify 1572517727736696832 1572516915560058880
pull-kubernetes-verify-govet-levee 1572517726474211328 1572516914725392384