Designate: create proxy ports on external VIP to access miniDNS workers
Designate: create proxy ports on external VIP to access miniDNS workers

While miniDNS servers are hosted on the internalAPI, they each need to
be accessible from external DNS servers to perform syncing. This is done
by doing a port->host mapping on haproxy.

Change-Id: I02f9f62be21b5f6c3c6edfb3cc2722ca5863d8c8

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo