Add dns_[name,domain] to the port module

The dns-integration extension adds the dns_name and dns_domain attributes
with this change updated/set operations can be done on those attributes

Change-Id: I4bb0f8692dec3fba5ab50f07571029f374761a5b

.zuul.yaml

@@ -29,6 +29,7 @@
         designate: https://opendev.org/openstack/designate
       devstack_services:
         designate: true
+        neutron-dns: true
 
 - job:
     name: ansible-collections-openstack-functional-devstack-octavia
@@ -57,6 +58,7 @@
         octavia: https://opendev.org/openstack/octavia
       devstack_services:
         designate: true
+        neutron-dns: true
         octavia: true
         o-api: true
         o-cw: true