zdtm.py: tests should not inherite file descriptors from zdtm.py

Cc: Dmitry Safonov <dsafonov@odin.com>
Reported-by: Dmitry Safonov <dsafonov@odin.com>
Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Tested-by: Dmitry Safonov <dsafonov@odin.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.py

@@ -296,7 +296,7 @@ class zdtm_test:
 		if env:
 			env = dict(os.environ, **env)
 
-		s = subprocess.Popen(s_args, env = env, cwd = root)
+		s = subprocess.Popen(s_args, env = env, cwd = root, close_fds = True)
 		s.wait()
 
 	def __pidfile(self):