fixup! testERP5WebWithDms: test Cache-Control header is overridden by Caching Policy Manager.

bt5/erp5_dms/TestTemplateItem/portal_components/test.erp5.testERP5WebWithDms.py

@@ -684,6 +684,7 @@ class TestERP5WebWithDms(ERP5TypeTestCase, ZopeTestCase.Functional):
                              policy.getStaleIfErrorSecs()))
     finally:
       self.portal.caching_policy_manager._policies['unauthenticated no language'] = policy_orig
+      transaction.commit()
 
   def test_PreviewOOoDocumentWithEmbeddedImage(self):
     """Tests html preview of an OOo document with images as extensible content.