Fixes to failing-test teardowns to avoid more exceptions or hangs

(cherry picked from commit 734f3d6f42ef1564f473fee5526e0354fc8196fc)

Conflicts:
	test.py

test.py

@@ -28,6 +28,7 @@ import sys
 import unittest
 from optparse import OptionParser
 import paramiko
+import threading
 
 sys.path.append('tests')
 
@@ -141,7 +142,12 @@ def main():
     if len(args) > 0:
         filter = '|'.join(args)
         suite = filter_suite_by_re(suite, filter)
-    runner.run(suite)
+    result = runner.run(suite)
+    # Clean up stale threads from poorly cleaned-up tests.
+    # TODO: make that not a problem, jeez
+    for thread in threading.enumerate():
+        if thread is not threading.currentThread():
+            thread._Thread__stop()
 
 
 if __name__ == '__main__':

tests/test_client.py

@@ -68,11 +68,9 @@ class SSHClientTest (unittest.TestCase):
         thread.start()
 
     def tearDown(self):
-        if hasattr(self, 'tc'):
-            self.tc.close()
-        self.ts.close()
-        self.socks.close()
-        self.sockl.close()
+        for attr in "tc ts socks sockl".split():
+            if hasattr(self, attr):
+                getattr(self, attr).close()
 
     def _run(self):
         self.socks, addr = self.sockl.accept()