[issue16919] Fix test discovery for test_crypt.py

[Roundup Robot]

Roundup Robot added the comment:

New changeset 15ddd683c321 by Ezio Melotti in branch '3.3':
#16919: test_crypt now works with unittest test discovery. Patch by Zachary Ware.
http://hg.python.org/cpython/rev/15ddd683c321

New changeset 5345f515e03b by Ezio Melotti in branch 'default':
#16919: merge with 3.3.
http://hg.python.org/cpython/rev/5345f515e03b

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nosy: +python-dev

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<http://bugs.python.org/issue16919>
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