Fix signal handlers by moving shutdown logic out of handler.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

tests/acceptance/cli_test.py

@@ -86,7 +86,8 @@ class ContainerStateCondition(object):
             return False
 
     def __str__(self):
-        return "waiting for container to have state %s" % self.expected
+        state = 'running' if self.running else 'stopped'
+        return "waiting for container to be %s" % state
 
 
 class CLITestCase(DockerClientTestCase):