[Merge] ~dannf/livecd-rootfs/+git/livecd-rootfs:udevadm-lock into livecd-rootfs:ubuntu/master

[dann frazier]

I think this is now ready to merge.
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https://code.launchpad.net/~dannf/livecd-rootfs/+git/livecd-rootfs/+merge/459549
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