Comment 2 for bug 1721790

Reviewed: https://review.openstack.org/510146
Committed: https://git.openstack.org/cgit/openstack/tripleo-quickstart-extras/commit/?id=0c451d80eacb2aef648c676c13aac5de6309b64e
Submitter: Jenkins
Branch: master

commit 0c451d80eacb2aef648c676c13aac5de6309b64e
Author: John Trowbridge <email address hidden>
Date: Fri Oct 6 10:46:23 2017 -0400

    Make sure ansible_distribution is defined

    If the ansible_distribution fact is not gathered, then the
    overcloud-deploy role will just fail while trying to
    evaluate it.

    Instead we just make sure it is defined before trying to
    evaluate it. This will have the consequence of any deploy
    which cannot check the ansible_distribution not getting the
    libvirt_args set unless by explicit config. However, that
    seems better than failing outright.

    Closes-Bug: #1721790

    Change-Id: I08c689b949372bae9ffd7eb4ce9576c5b37d138d