Title: #1139: [Backport][ipa-4-6] travis: make tests fail if pep8 does not pass
This PR was opened automatically because PR #1122 was pushed to master and backport to
ipa-4-6 is required.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/1139/head:pr1139
git checkout pr1139