[freeipa PR#439][synchronized] Testing both py2/py3 in travis

[MartinBasti]

   URL: https://github.com/freeipa/freeipa/pull/439
Author: MartinBasti
 Title: #439: Testing both py2/py3 in travis
Action: synchronized

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/439/head:pr439
git checkout pr439