Add dependency on centos-release-nfv-openvswitch
    
    We planning to consume ovs/ovn builds from NFV SIG and
    backport rdo-openvswitch related change[1] to ussuri and
    for that we want nfv-openvswitch repos to be included, this
    patch does that.
    
    [1] https://review.rdoproject.org/r/#/c/29009/