Remove old DNS servers

Remove adns1/ns1/ns2 which are no longer in use.  Switch the primary
master to adns02; the secondaries ns03/ns04 will now update from
there.

Change-Id: I700a514dd2b72b2632e8d0668251f52907008d44
Depends-On: https://review.opendev.org/c/opendev/zone-opendev.org/+/880709

inventory/service/group_vars/adns-primary.yaml

@@ -6,21 +6,11 @@ dns_repos:
   - name: zone-gating.dev
     url: https://opendev.org/opendev/zone-gating.dev
 dns_notify:
-  # ns1.opendev.org
-  - 104.239.140.165
-  # ns2.opendev.org
-  - 162.253.55.16
   # ns03.opendev.org
   - 104.239.145.127
   # ns04.opendev.org
   - 162.253.55.23
 iptables_extra_allowed_hosts:
-  - protocol: tcp
-    port: 53
-    hostname: ns1.opendev.org
-  - protocol: tcp
-    port: 53
-    hostname: ns2.opendev.org
   - protocol: tcp
     port: 53
     hostname: ns03.opendev.org

inventory/service/group_vars/adns-secondary.yaml

@@ -1,5 +1,6 @@
-dns_master_ipv4: 104.239.146.24
-dns_master_ipv6: 2001:4800:7819:104:be76:4eff:fe04:43d0
+# adns02.opendev.org
+dns_master_ipv4: 104.239.136.158
+dns_master_ipv6: 2001:4801:7827:102:397b:de86:1265:fe84
 
 iptables_extra_public_tcp_ports:
   - 53