[issue21918] Convert test_tools to directory

[Zachary Ware]

Zachary Ware added the comment:

Committed, thanks for the reviews!

I had modeled load_tests after test_json's load_tests.  The idiom used in test_email causes a warning from regrtest about sys.path being modified, so I modified the idiom slightly and used that.  I have declined to backport the patch to 2.7; it's more trouble than it's worth to me.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21918>
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