Code review comment for simplestreams:drop-py2-packages

It looks like this didn't fully work.
You missed some references to python2.

https://launchpad.net/~simplestreams-dev/+archive/ubuntu/trunk/+build/18160048

looks like:
 * tests/httpserver.py (although i think this is only called by uniti tests, and called sys.executable)
 * tools/js2signed: this gets called from sign-examples (examples-sign target in make).
 * tools/make-test-data: used by make exdata

i think the first thing i'd try is the obvious:
 http://paste.ubuntu.com/p/4bNjgdBwmd/