Move dns zone info to use proxy layer

Make it compatible with new SDK.
Although this one was already using self.con.dns.zones to retrieve the
zones, it wasn't using the to_dict(computed=False) and was still
removing the location (which is obsolate when you use to_dict.

Change-Id: Ie2a5b772acc0c8c8338f6f1da877564a077e3b7a
(cherry picked from commit 0c6e8bed69)

ci/roles/dns_zone_info/tasks/main.yml

@@ -34,6 +34,14 @@
       - zone is not changed
       - zone.zones | length == 1
 
+- name: Assert keys exist
+  assert:
+    that:
+      - '["action", "attributes", "created_at", "description", "email",
+          "links", "masters", "name", "pool_id", "project_id", "serial",
+          "status", "ttl", "type", "updated_at", "id"] |
+          difference(zone.zones.0.keys()) | length == 0'
+
 - name: Drop created dns zone
   openstack.cloud.dns_zone:
     cloud: "{{ cloud }}"

plugins/modules/dns_zone_info.py

@@ -161,12 +161,8 @@ class DnsZoneInfoModule(OpenStackModule):
         if ttl:
             kwargs['ttl'] = ttl
 
-        data = []
-
-        for raw in self.conn.dns.zones(**kwargs):
-            dt = raw.to_dict()
-            dt.pop('location')
-            data.append(dt)
+        data = [zone.to_dict(computed=False) for zone in
+                self.conn.dns.zones(**kwargs)]
 
         self.exit_json(zones=data, changed=False)