[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:
----------------------
test_smtplib leaked [-85, 0, 86] references, sum=1
test_socketserver leaked [82, -82, 80] references, sum=80
test_threadsignals leaked [-8, 0, 0] references, sum=-8
test_urllib2_localnet leaked [3, 182, -176] references, sum=9