Code review comment for lp:~paelzer/curtin/bug-1574113-derived-repositories

Hi,
thanks again for the review.

I added some comments to your feedback where appropriate.
ALmost all is accepted and integrated, just sometimes in slightly modified ways and the comments state the reasons.
Any non commented feedback is acked and integrated as suggested.

My own unit and vmtests are fine still, I'll run a full suite of vmtests and if successful push to the MP for the next round of review or acceptance.