Add ovs and dpdk source to available repos
Add ovs and dpdk source to available repos

This change adds the upstream dpdk and ovs
github repos to the openstack tenant to allow
networking-ovs-dpdk to use zuul to prestage the
repos instead of git cloning them during devstack
installation.

Change-Id: I65ffceb0e63b9c5dcbc995e9d9e52abf1f9ac4ee

openstack-infra/project-config,openstack-infra/project-config