DR: reload systemd services on disk before starting kubelet in etcd restore script

[vrutkovs]

- What I did
Updated etcd restore script to reload systemd before starting kubelet

- How to verify it

1. Change kubelet on disk
2. Run etcd restore script

If the service has changed kubelet won't start without daemon reload:

+ echo 'Starting kubelet..'
+ systemctl start kubelet.service
Warning: The unit file, source configuration file or drop-ins of kubelet.service changed on disk. Run 'systemctl daemon-reload' to reload units

I'm not quite sure what's changing kubelet on disk during this procedure though

/cc @patrickdillon @hexfusion

[cgwalters]

Can you add DR: or so as a "topic prefix" in the commit messages? I thought this PR was about the main kubelet config at first.

Also...hopefully at some point soon these scripts will gain a new canonical upstream in a container and we can only do backports where necessary here? 4.2 development is open, we can make new containers now...

[vrutkovs]

/retest

[cgwalters]

/approve

[runcom]

/lgtm

[openshift-ci-robot]

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This pull-request has been approved by: cgwalters, runcom, vrutkovs

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