[issue22060] Clean up ctypes.test, use unittest test discovery

[Zachary Ware]

Changes by Zachary Ware <zachary.ware at gmail.com>:


Added file: http://bugs.python.org/file36313/issue22060.v2.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22060>
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