- removing sitepackages in tox.ini to avoid test env pollution
- skip_missing_interpreters in tox.ini set to False to avoid false
positives by skipping missing interpreters.
Change-Id: I6a6afc636a4a2cfc787ba8b82b80edffb37359a0
We want to default to running all tox environments under python 3, so
set the basepython value in each environment.
We do not want to specify a minor version number, because we do not
want to have to update the file every time we upgrade python.
We do not want to set the override once in testenv, because that
breaks the more specific versions used in default environments like
py35 and py36.
Change-Id: Ic22596fe76e2c581323ecadb3723336668e55623
Signed-off-by: Doug Hellmann <doug@doughellmann.com>