[Merge] ~davidkrauser/livecd-rootfs/+git/livecd-rootfs:hyperv-gallery-images into livecd-rootfs:ubuntu/master

[Tiago Stürmer Daitx]

Another issue is that this change no longer applies to cleanly upon the master branch.

There have been changes to live-build/auto/config that cause a merge conflict, please take a look and fix those. Thanks!
-- 
https://code.launchpad.net/~davidkrauser/livecd-rootfs/+git/livecd-rootfs/+merge/366849
Your team Ubuntu Core Development Team is subscribed to branch livecd-rootfs:ubuntu/master.