rphillips: e2e node server: fix crash in log line

JobBuild
104040
07-30 17:40
163e4974
07-30 17:39
pull-kubernetes-conformance-kind-ga-only-parallel 1421163434594013184
pull-kubernetes-conformance-kind-ipv6-parallel 1421163434325577728
pull-kubernetes-dependencies 1421163434384297984
pull-kubernetes-e2e-gce-100-performance 1421163435151855616
pull-kubernetes-e2e-gce-ubuntu-containerd 1421163434434629632
pull-kubernetes-e2e-kind 1421163434518515712
pull-kubernetes-e2e-kind-ipv6 1421163434539487232
pull-kubernetes-integration 1421163434472378368
pull-kubernetes-node-crio-e2e 1421163434690482176
pull-kubernetes-node-e2e-containerd 1421163434673704960
pull-kubernetes-typecheck 1421163435978133504
pull-kubernetes-unit 1421163434640150528
pull-kubernetes-verify 1421163437655855104
pull-kubernetes-verify-govet-levee 1421163436821188608