[Python-checkins] Python Regression Test Failures refleak (2)

[Neal Norwitz]

More important issues:
----------------------
test___all__ leaked [1, 1, 1] references, sum=3
test_urllib2_localnet leaked [0, 0, 291] references, sum=291

Less important issues:
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test_smtplib leaked [-160, 0, 0] references, sum=-160
test_sys leaked [-21, -21, 0] references, sum=-42
test_threading leaked [48, 48, 48] references, sum=144