Merge pull request #30749 from wojtek-t/fix_serial_mode

Revert part of #30424

hack/jenkins/dockerized-e2e-runner.sh

@@ -35,7 +35,6 @@ env \
   -u PATH \
   -u PWD \
   -u WORKSPACE \
-  -u GOROOT \
   >${WORKSPACE}/env.list
 
 docker_extra_args=()
@@ -63,4 +62,5 @@ docker run --rm=true -i \
   -e "WORKSPACE=/workspace" \
   ${KUBEKINS_SERVICE_ACCOUNT_FILE:+-e "KUBEKINS_SERVICE_ACCOUNT_FILE=/service-account.json"} \
   "${docker_extra_args[@]:+${docker_extra_args[@]}}" \
-  gcr.io/google-containers/kubekins-e2e:v20160810
+  gcr.io/google_containers/kubekins-test:go1.6.3-docker1.9.1-rev3 \
+  bash -c "bash <(curl -fsS --retry 3 --keepalive-time 2 'https://raw.githubusercontent.com/kubernetes/kubernetes/master/hack/jenkins/e2e-runner.sh')"