Bug 1577048

Description of problem:
Yum reports ovirt-4.2-epel is corrupted.  Inclusion of this repo results in yum reporting:
file is encrypted or is not a database

This obviously prevents host installations.

Version-Release number of selected component (if applicable):
4.2.3.5-1.el7.centos

How reproducible:
Always since about an hour ago.

Steps to Reproduce:
1. yum install http://resources.ovirt.org/pub/yum-repo/ovirt-release42.rpm
2. yum update

Actual results:
```[root@vm1 yum.repos.d]# yum update
Loaded plugins: fastestmirror, versionlock
Determining fastest mirrors
ovirt-4.2-epel/x86_64/metalink                                                                                                                                                              | 5.5 kB  00:00:00
 * base: centos.mirror.vexxhost.com
 * extras: centos.mirror.vexxhost.com
 * ovirt-4.2: mirrors.rit.edu
 * ovirt-4.2-epel: ewr.edge.kernel.org
 * updates: centos.mirror.vexxhost.com
Webmin                                                                                                                                                                                      | 1.0 kB  00:00:00
base                                                                                                                                                                                        | 3.6 kB  00:00:00
centos-sclo-rh-release                                                                                                                                                                      | 3.0 kB  00:00:00
extras                                                                                                                                                                                      | 3.4 kB  00:00:00
ovirt-4.2                                                                                                                                                                                   | 3.0 kB  00:00:00
ovirt-4.2-centos-gluster312                                                                                                                                                                 | 2.9 kB  00:00:00
ovirt-4.2-centos-opstools                                                                                                                                                                   | 2.9 kB  00:00:00
ovirt-4.2-centos-ovirt42                                                                                                                                                                    | 2.9 kB  00:00:00
ovirt-4.2-centos-qemu-ev                                                                                                                                                                    | 2.9 kB  00:00:00
ovirt-4.2-epel                                                                                                                                                                              | 4.7 kB  00:00:00
ovirt-4.2-virtio-win-latest                                                                                                                                                                 | 3.0 kB  00:00:00
updates                                                                                                                                                                                     | 3.4 kB  00:00:00
(1/14): base/7/x86_64/group_gz                                                                                                                                                              | 166 kB  00:00:00
(2/14): extras/7/x86_64/primary_db                                                                                                                                                          | 104 kB  00:00:00
(3/14): ovirt-4.2/7/primary_db                                                                                                                                                              | 483 kB  00:00:00
(4/14): base/7/x86_64/primary_db                                                                                                                                                            | 5.9 MB  00:00:00
(5/14): ovirt-4.2-centos-opstools/x86_64/primary_db                                                                                                                                         | 196 kB  00:00:00
(6/14): ovirt-4.2-centos-gluster312/x86_64/primary_db                                                                                                                                       | 102 kB  00:00:00
(7/14): centos-sclo-rh-release/x86_64/primary_db                                                                                                                                            | 3.2 MB  00:00:00
(8/14): ovirt-4.2-centos-ovirt42/x86_64/primary_db                                                                                                                                          | 119 kB  00:00:00
ovirt-4.2-epel/x86_64/primary_ FAILED
http://mirror.metrocast.net/fedora/epel/7/x86_64/repodata/65e078711712530080b8c3cc68254df2c2394a17477f8718d7090bbfa990be1e-primary.sqlite.bz2: [Errno 14] HTTP Error 404 - Not Found0.0 B/s | 8.3 MB  --:--:-- ETA
Trying other mirror.
To address this issue please refer to the below wiki article

https://wiki.centos.org/yum-errors

If above article doesn't help to resolve this issue please use https://bugs.centos.org/.

(9/14): ovirt-4.2-centos-qemu-ev/x86_64/primary_db                                                                                                                                          |  37 kB  00:00:00
(10/14): ovirt-4.2-epel/x86_64/group_gz                                                                                                                                                     |  84 kB  00:00:00
(11/14): ovirt-4.2-epel/x86_64/updateinfo                                                                                                                                                   | 921 kB  00:00:00
(12/14): updates/7/x86_64/primary_db                                                                                                                                                        | 1.0 MB  00:00:00
(13/14): ovirt-4.2-epel/x86_64/primary_db                                                                                                                                                   | 1.6 MB  00:00:00
(14/14): ovirt-4.2-virtio-win-latest/primary_db                                                                                                                                             | 6.4 kB  00:00:00
Webmin/primary                                                                                                                                                                              |  15 kB  00:00:00
Webmin                                                                                                                                                                                                     116/116


 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=<repoid> ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>
        or
            subscription-manager repos --disable=<repoid>

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

file is encrypted or is not a database
```

Expected results:
Successful yum update.

Additional info:
Started happening an hour ago.  Tried clearing the cache via rm -rf /var/cache/yum to try multiple mirrors.  Tried about 7 times.  Same error always.