Avoid systemd ddos with kubelet if it fails to start

This patch introduces restart sleeps, e.g. systemd
will be wait 2s between stop and start kubelet.
This will help to avoid issues with systemd in case
if some salts going to reapplied due previous fails.

The problem appears if some of critial components
failed to install with first try. Usually, kubelet installed
successfully, but calico/criproxy/dockershim may
become a showstopper for kubelet. So, without this param
kubelet throttling systemd with restarts because can not
start correctly.

Change-Id: Ifaad5c60a1afb6c61bbd0b4549df7054d442979c
1 file changed