[Merge] ~ddstreet/livecd-rootfs:switch-to-launchpadlib into livecd-rootfs:ubuntu/master

[Dan Streetman]

this is an alternate option to https://code.launchpad.net/~ddstreet/livecd-rootfs/+git/livecd-rootfs/+merge/389235
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https://code.launchpad.net/~ddstreet/livecd-rootfs/+git/livecd-rootfs/+merge/389260
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