Check zone_id in notification_handler to avoid UUID format issue.

Closes-Bug: #1977826
Change-Id: I81a4883fd48653c3b0d60ac07210fc0de55ac12a
(cherry picked from commit 42dac06e0c)

designate/notification_handler/neutron.py

@@ -44,6 +44,12 @@ class NeutronFloatingHandler(base.BaseAddressHandler):
                   self.get_canonical_name(), event_type)
 
         zone_id = cfg.CONF[self.name].zone_id
+
+        if not zone_id:
+            LOG.error('NeutronFloatingHandler: zone_id is None, '
+                      'ignore the event.')
+            return
+
         if event_type.startswith('floatingip.delete'):
             self._delete(zone_id=zone_id,
                          resource_id=payload['floatingip_id'],

designate/notification_handler/nova.py

@@ -48,6 +48,11 @@ class NovaFixedHandler(BaseAddressHandler):
         LOG.debug('NovaFixedHandler received notification - %s', event_type)
 
         zone_id = cfg.CONF[self.name].zone_id
+
+        if not zone_id:
+            LOG.error('NovaFixedHandler: zone_id is None, ignore the event.')
+            return
+
         if event_type == 'compute.instance.create.end':
             payload['project'] = context.get("project_name", None)
             self._create(addresses=payload['fixed_ips'],