code: def tearDown(self):
      copyfile(self.bk_db, self.ori_db)
      os.remove(self.bk_db)
  
imports: import os
  import unittest
  from shutil import copyfile
  from shutil import rmtree
  import json
  from aup import BasicConfig
  from aup.EE.Job import Job
  from aup.EE.Resource.CPUResourceManager import CPUResourceManager
  from aup.utils import get_default_connector
label_desc: Use image node_id 2 for calling the CPUResourceManagerTestCase obj's underlying member method code with example usage: obj.tearDown() without return types