[issue17767] Fix test discovery for test_locale.py

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I combined two last Zachary's patches and added more robust locale test cleanup (old locale now restored even when print() in setUp() will failed).

Thank you for your patch Zachary.

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resolution:  -> fixed
stage: patch review -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17767>
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