Code review comment for lp://staging/~brendan-donegan/ubuntu-power-tests/tc-powermeter-07

I've created a new branch (dependent on this one) which will remove existing networks in tc-powermeter-07, and restore them in prepare-device. See here:

https://code.launchpad.net/~canonical-platform-qa/ubuntu-power-tests/backup-restore-network/+merge/259099

I think this addresses the problem. It would just assume that a network is already setup on the device, and the saved network details would persist after reboot, so they can be easily restored.

Let me know what you think.