Monty Taylor 329b939241
Add ability to run any tox env in python3
To test this I ran the pep8 tox env with python3 set - and lo and behold
there was a python3 mistake in a functional test. Whoops.

Change-Id: Ia93a2a85e420d164d67abee479ad498b5e6d3167
2017-05-19 12:39:21 -05:00
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