Use a designate specific directory for the bind persistent storage

Give the designate bind instance it's own persistent storage path to
avoid collisions with non-tripleo-owned bind instances.

Change-Id: Id05b48c97d5d9f2cdeba5dfad67616bf97b7fcae

deployment/designate/designate-bind-container.yaml

@@ -138,13 +138,13 @@ outputs:
                   - /var/lib/kolla/config_files/designate_backend_bind9.json:/var/lib/kolla/config_files/config.json:ro
                   - /var/lib/config-data/ansible-generated/designate:/var/lib/kolla/config_files/src:ro
                   - /var/log/containers/designate:/var/log/designate:z
-                  - /var/named-persistent:/var/named-persistent:z
+                  - /var/lib/designate/named-persistent:/var/named-persistent:z
             environment:
               KOLLA_CONFIG_STRATEGY: COPY_ALWAYS
       host_prep_tasks:
         - name: create persistent named directory
           file:
-            path: /var/named-persistent
+            path: /var/lib/designate/named-persistent
             state: directory
             setype: container_file_t
             mode: '0750'