[PyQt] dip unit tests

[Darren Dale]

I just noticed a problem when running the dip test suite with
python-2.6 and unittest:

File "/Users/darren/Projects/dip/test/tests/dip_ui/test_mapping.py",
line 26, in TestMapping
    @unittest.expectedFailure
AttributeError: 'module' object has no attribute 'expectedFailure'

If I install unittest2, I can run the test suite.

Regards,
Darren