caddy-frontend: Add missing kedifa updater in tests

The missing run was hidden by slow Caddy warmup procedure.

software/caddy-frontend/test/test.py

@@ -723,6 +723,7 @@ class HttpFrontendTestCase(SlapOSInstanceTestCase):
       data=cls.key_pem + cls.certificate_pem,
       verify=cls.ca_certificate_file)
     assert upload.status_code == httplib.CREATED
+    cls.runKedifaUpdater()
 
   @classmethod
   def runKedifaUpdater(cls):