Use a full, absolute import to avoid importing twice the backportUnittest module

using two different names, and not catching exceptions because of different module
paths


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33681 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testERP5Interfaces.py

@@ -28,7 +28,7 @@
 
 from Products.ERP5Type.tests.ERP5TypeTestCase import ERP5TypeTestCase
 from Products.ERP5Type.tests.testERP5TypeInterfaces import addTestMethodDynamically
-from backportUnittest import expectedFailure
+from Products.ERP5Type.tests.backportUnittest import expectedFailure
 import unittest
 
 # this list can be generated automatically using introspection or can be set