Comment 10 for bug 1770355

Reviewed: https://review.openstack.org/567636
Committed: https://git.openstack.org/cgit/openstack/tripleo-common/commit/?id=3f12a00533e32d894ad18627e6be1163c0dd5ad8
Submitter: Zuul
Branch: master

commit 3f12a00533e32d894ad18627e6be1163c0dd5ad8
Author: Alex Schultz <email address hidden>
Date: Thu May 10 10:18:55 2018 -0600

    Add yum update to base

    In order to handle out of date distro containers, let's add a yum update
    to the kolla base container to ensure that at the end of the base
    container build we'll have the latest base packages installed. This will
    ensure we don't hit out of date dependency bits in later containers. For
    example, we currently only have 7.4 base centos image available from the
    upstream but we're install the base repos in the base build. This would
    mean that we'd be getting 7.5 packages in later containers but might
    possibly have a mix of 7.4 and 7.5 packages installed.

    Change-Id: Ifdfc1b84b7b6a306868260611271fd49bdd594d4
    Related-Bug: #1770355