code: def tearDown(self):
      self.server.__exit__()
      copyfile(self.bk_db, self.ori_db)
      os.remove(self.bk_db)
  
imports: import unittest
  import mockssh
  import tempfile
  import pdb
  from shutil import copyfile
  from time import sleep
  from six import PY2
  import pkg_resources
  from aup.EE.Resource.SSHResourceManager import *
  from aup.EE.Job import Job
  from aup import BasicConfig
  from aup.Proposer import RandomProposer
  from aup.utils import get_default_connector
  from threading import Lock
label_desc: Use image node_id 2 for calling the SSHResourceManagerEarlyStopTestCase obj's underlying member method code with example usage: obj.tearDown() without return types