[Python-checkins] Python Regression Test Failures refleak (1)

[Neal Norwitz]

More important issues:
----------------------
test_io leaked [61, 61, 61] references, sum=183

Less important issues:
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test_asynchat leaked [0, 110, -110] references, sum=0
test_smtplib leaked [-8, 8, -6] references, sum=-6
test_threadsignals leaked [-8, 0, 0] references, sum=-8
test_urllib2_localnet leaked [146, -140, 146] references, sum=152