Comment 4 for bug 1717550

The problem appears to be one of the other repositories interfering with quickstart-centos-base. If I disable delorean-pike-testing, the newer version of python-dns is available for upgrade:

Before disabling delorean-pike-testing:

  ><fs> command "sh -c 'yum clean all; yum -y upgrade python-dns'"
  No packages marked for update

Disabling delorean-pike-testing:

  ><fs> command "sed -i s/enabled=1/enabled=0/ /etc/yum.repos.d/delorean-pike-testing.repo"

Trying the upgrade again:

  ><fs> command "sh -c 'yum clean all; yum -y upgrade python-dns'"
  Updated:
    python-dns.noarch 0:1.12.0-4.20150617git465785f.el7

  Complete!