There was a recent change announced on the CentOS
mailing lists [1] regarding housing centos-release-SIG
repos for CPU architectures other than x86_64. We rely on
centos-release-pike within our test jobs and the
repo centos-qemu-ev is found under [2].
There is now a YUM variable called $contentdir
which determines where the repos may be, and this
variable isn't set in the base images.
With $contentdir set, the URLs resolve correctly
within /etc/yum.repos.d/CentOS-QEMU-EV.repo.
See corresponding fixes for kolla [3] and
tripleo-quickstart-extras [4]
[1] https://lists.centos.org/pipermail/centos-devel/2018-March/016542.html
[2] http://mirror.centos.org/centos/7/virt/x86_64/kvm-common
[3] Ieb26c0aa65ba3ec1a45a33f87f670e5ecb782f82
[4] I6279bd4088bd87f37c58b7da25b675c5456506d6
Change-Id: Idcacfb6dbfb0760128f10dbc0573856e4250b3bc
Closes-Bug: #1771969
227709ba9b