Handle the API migration

If it;s the new format API hide the results

- Temp fix until new Admin code ships. Should be live for 5 mins.

app/notify_client/template_statistics_api_client.py

@@ -16,11 +16,17 @@ class TemplateStatisticsApiClient(BaseAPIClient):
         params = {}
         if limit_days is not None:
             params['limit_days'] = limit_days
-        return self.get(
+
+        response = self.get(
             url='/service/{}/template-statistics'.format(service_id),
             params=params
         )['data']
 
+        if len(response) > 0 and 'template' in response[0]:
+            return response
+
+        return []
+
     def get_template_statistics_for_template(self, service_id, template_id):
         return self.get(
             url='/service/{}/template-statistics/{}'.format(service_id, template_id)