[issue1550273] Fix numerous bugs in unittest

[Ionut Turturica]

Ionut Turturica <jonozzz at yahoo.com> added the comment:

I keep trying to repro this on a smaller scale TestSuite but without any
success. The whole test framework has around 300 tests and I can't
really upload it.

In the mean time I changed the TestSuite's __eq__ back to identity.

I will attach the _breadth_first() method that parses the TestSuites.

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Added file: http://bugs.python.org/file14744/test_pybug.py

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