Merge pull request #14098 from klaases/preload2

Add cleanup and reboot to preload generation

hack/jenkins/preload_generation.sh

@@ -20,6 +20,9 @@
 
 set -eux -o pipefail
 
+mkdir -p cron && gsutil -qm rsync "gs://minikube-builds/master/cron" cron || echo "FAILED TO GET CRON FILES"
+sudo install cron/cleanup_and_reboot_Linux.sh /etc/cron.hourly/cleanup_and_reboot || echo "FAILED TO INSTALL CLEANUP"
+
 # Make sure the right golang version is installed based on Makefile
 ./hack/jenkins/installers/check_install_golang.sh /usr/local