[Merge] ~rcj/livecd-rootfs/+git/livecd-rootfs:feature/snap_cohort_key-xenial into livecd-rootfs:ubuntu/xenial

[Robert C Jennings]

Thanks Phil, I needed to update and rebase.  It's all sorted now.
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https://code.launchpad.net/~rcj/livecd-rootfs/+git/livecd-rootfs/+merge/379689
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~rcj/livecd-rootfs/+git/livecd-rootfs:feature/snap_cohort_key-xenial into livecd-rootfs:ubuntu/xenial.