[Merge] ~gjolly/livecd-rootfs:ubuntu-cpc/device_busy into livecd-rootfs:ubuntu/master

[Michael Hudson-Doyle]

> Because I tested it and it works. Sometimes you have to wait for 1min and not 30s.

Fair enough.

Add an upper bound of 5 or 10 minutes and I'm happy to merge this.

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https://code.launchpad.net/~gjolly/livecd-rootfs/+git/livecd-rootfs/+merge/448708
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~gjolly/livecd-rootfs:ubuntu-cpc/device_busy into livecd-rootfs:ubuntu/master.