adns: Set zone directory permissions

Bind needs to be able to write to the zone directories in order
to sign the zones.

Change-Id: I5649c28c6f7d8d98e0eca3c9c4da5d7312198b5c

playbooks/roles/master-nameserver/tasks/main.yaml

@@ -19,6 +19,9 @@
   synchronize:
     src: "/opt/source/{{ item.source }}"
     dest: "/var/lib/bind/zones/{{ item.name }}"
+    rsync_opts:
+      - "--chmod=u+rwX,g+rX,o+rX"
+      - "--chown=bind:bind"
   loop: "{{ dns_zones }}"
   notify: Reload named
 - name: Install tsig key