Remove dependency on EPEL

The EPEL repositories currently conflict with the RDO packages,
this commit drops it from openstack_hosts so new installs do not
get it.

Change-Id: Iecc021a294befb64f54d73cc926faeea21cba372

tasks/repo_cacher.yml

@@ -13,13 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-- name: Disable epel-testing repository for cacher packages
-  command: yum-config-manager --disable epel-testing
-  when:
-    - ansible_pkg_mgr == 'yum'
-  tags:
-    - repo_server-install
-
 - name: Install repo caching server packages
   package:
     name: "{{ repo_pkg_cache_server_distro_packages }}"

templates/acng.conf.j2

@@ -11,7 +11,6 @@ Remap-cygwin: file:cygwin_mirrors /cygwin # ; file:backends_cygwin # incomplete,
 Remap-sfnet:  file:sfnet_mirrors # ; file:backends_sfnet # incomplete, please create this file or specify preferred mirrors here
 Remap-alxrep: file:archlx_mirrors /archlinux # ; file:backend_archlx # Arch Linux
 Remap-fedora: file:fedora_mirrors # Fedora Linux
-Remap-epel:   file:epel_mirrors # Fedora EPEL
 Remap-slrep:  file:sl_mirrors # Scientific Linux
 Remap-centos: file:centos_mirrors /centos #centos
 ReportPage: acng-report.html