'Context.destroy should set linger on closing sockets'

def test_destroy_linger(self):

    (req, rep) = self.create_bound_pair(zmq.REQ, zmq.REP)
    req.send('hi')
    time.sleep(0.01)
    self.context.destroy(linger=0)
    time.sleep(0.01)
    for s in (req, rep):
        self.assertTrue(s.closed)
