zope 2.7 compatibility

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@22206 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testContributionRegistryTool.py

@@ -28,7 +28,10 @@
 
 import unittest
 from Products.ERP5Type.tests.ERP5TypeTestCase import ERP5TypeTestCase
-from transaction import get_transaction
+try:
+  from transaction import get_transaction
+except ImportError:
+  pass
 
 
 class TestContributionRegistryTool(ERP5TypeTestCase):