Add Python 3 Train unit tests

This is a mechanically generated patch to ensure unit testing is in place
for all of the Tested Runtimes for Train.

See the Train python3-updates goal document for details:
https://governance.openstack.org/tc/goals/train/python3-updates.html

Change-Id: I88c28ddf9601bb7b69b663a44562ab2c118050de
Story: #2005924
Task: #34215

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 43401c9..cb020c4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 minversion = 2.5.0
 skipsdist = True
-envlist = py37,py36,py27,pep8,releasenotes
+envlist = py27,py37,pep8,releasenotes
 
 [testenv]
 usedevelop = True