[issue20910] Make sleep configurable in tests

[Roundup Robot]

Roundup Robot added the comment:

New changeset d1c80a5b42ad by Victor Stinner in branch 'default':
Issue #20910: Make tests more reliable, less dependent on time
http://hg.python.org/cpython/rev/d1c80a5b42ad

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20910>
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