[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_cmd_line leaked [0, 0, -23] references, sum=-23
test_smtplib leaked [81, -81, 0] references, sum=0
test_threadedtempfile leaked [-91, 0, 0] references, sum=-91
test_threadsignals leaked [-8, 0, 0] references, sum=-8
test_urllib2_localnet leaked [146, 134, -128] references, sum=152