Comment 3 for bug 1656884

I have tested the new change and it works OK now.

1. I followed the Hacking guide to install snapcraft (instead of my original report's notes).
2. I used a clean 16.04 LXD container for the testing.
3. I applied the patch from the github pull request.

The variables that common.py touches, have been updated to

/home/ubuntu/venv/snapcraft/share/snapcraft/plugins
/home/ubuntu/venv/snapcraft/share/snapcraft/schema
/home/ubuntu/venv/snapcraft/share/snapcraft/libraries
/home/ubuntu/venv/snapcraft/share/snapcraft/tour

And here is the output of the creation of the null snap,

$ snapcraft
Preparing to pull my-part
Pulling my-part
Preparing to build my-part
Building my-part
Staging my-part
Priming my-part
Snapping 'my-snap-name' |
Snapped my-snap-name_0.1_amd64.snap
$ _