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

[Neal Norwitz]

More important issues:
----------------------
test_threading leaked [0, 0, 5] references, sum=5

Less important issues:
----------------------
test_threadsignals leaked [0, -8, 0] references, sum=-8
test_urllib2_localnet leaked [3, 3, 3] references, sum=9
test_cmd_line leaked [-23, 0, 23] references, sum=0
test_smtplib leaked [86, -86, 3] references, sum=3
test_socketserver leaked [-75, 0, 0] references, sum=-75