Allow getSite() or getSiteManager() to be used during beforeTearDown on Zope 2.12

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33107 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/ERP5TypeTestCase.py

@@ -1028,8 +1028,8 @@ class ERP5TypeTestCase(backportUnittest.TestCase, PortalTestCase):
       '''Tears down the fixture. Do not override,
          use the hooks instead.
       '''
+      PortalTestCase.tearDown(self)
       setSite() # undo site configuration from self.getPortal()
-      return PortalTestCase.tearDown(self)
 
     def beforeClose(self):
       PortalTestCase.beforeClose(self)