[Merge] ~mwhudson/livecd-rootfs/+git/livecd-rootfs:minimal-server-layer-3 into livecd-rootfs:ubuntu/master

[Michael Hudson-Doyle]

> Some questions on the layer choices and if we can use the live pass helpers.
> Otherwise good :)

Did you forget to save some diff comments, I don't see anything?
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https://code.launchpad.net/~mwhudson/livecd-rootfs/+git/livecd-rootfs/+merge/406342
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