Address failed systemd-units at boot

[fwilhe]

What happened: When booting the images, a few units fail

What you expected to happen: Units don't fail at boot. Either their configuration can be fixed, or they are not needed and should not be included in the image.

How to reproduce it (as minimally and precisely as possible): Build the gardenlinux kvm image and boot it using start-vm and observe the boot logs.

Anything else we need to know:

Environment: