Fix DummyMailHost._send() signature to match Zope 2.12

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@31426 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/utils.py

@@ -61,7 +61,7 @@ class DummyMailHost(MailHost):
   _last_message = ()
   _previous_message = ()
   _message_list = []
-  def _send( self, mfrom, mto, messageText ):
+  def _send( self, mfrom, mto, messageText, immediate=False ):
     """Record message in _last_message."""
     self._previous_message = self._last_message
     self._last_message = (mfrom, mto, messageText)