Restrict packages from CentOS to OVS only

In order to make sure we do not pull in any unwanted package versions
from the new CentOS PaaS SIG repository, we can restrict the packages
that `yum` will consider this repository to only OpenVSwitch.

Signed-off-by: Steve Kuznetsov <[email protected]>

Author: stevekuznetsov

images/node/centos-paas-sig-openshift-origin15.repo

@@ -4,3 +4,4 @@ baseurl = https://buildlogs.centos.org/centos/7/paas/x86_64/openshift-origin15/
 enabled = 1
 gpgcheck = 0
 sslverify = 0
+includepkgs = openvswitch