Fix stepCheckMigratedPropertySheetRemoved for Zope 2.8

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43090 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testBusinessTemplate.py

@@ -2453,7 +2453,7 @@ class TestBusinessTemplate(ERP5TypeTestCase, LogInterceptor):
     """
     ps_id = sequence.get('ps_title', None)
     self.failIf(ps_id is None)
-    self.failIf(ps_id in self.getPortalObject().portal_property_sheets)
+    self.failIf(ps_id in self.getPortalObject().portal_property_sheets.objectIds())
 
   def stepCreateUpdatedPropertySheet(self, sequence=None, sequence_list=None, **kw):
     """