add python 3.6 unit test job

This is a mechanically generated patch to add a unit test job running
under Python 3.6 as part of the python3-first goal.

See the python3-first goal document for details:
https://governance.openstack.org/tc/goals/stein/python3-first.html

Change-Id: Ib0722f5674e40eff4c75ac6ea61f862fc81dfa1d
Story: #2002586

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 2470364..658f92c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py35,pypy,pep8,releasenotes
+envlist = py27,py35,py36,pypy,pep8,releasenotes
 minversion = 2.0
 skipsdist = True