This is a minor issue, but when somebody just runs 'tox', this will
ensure that tox tries to run with all known working interpreters.
Change-Id: I745912bc1f449e4d370d1e9248efe9eb1a84d90a
pep8 with 1.6.x is now failing as it wants all imports at the
beginning of the file. Unfortunately, this does not work for us in
all circumstances. Therefore, ignore E402 and fix the E402's where
it actually makes sense.
Refactor the builders to so that a user may specify one of 2 paths:
system packages or docker containers. This change also encompasses a
bunch of other minor changes. This is being checked in in order to
get some minimally viable changes upstream.