docstr: teardown any state that was previously setup with a setup_method
  call.
docstr_tok: ["teardown","any","state","that","was","previously","setup","with","a","setup_method","call","."]
code: def tearDown(self):
      """teardown any state that was previously setup with a setup_method
      call.
      """
      stop_orca_context()
  
imports: from unittest import TestCase
  import os
  import pytest
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
  from zoo.orca import init_orca_context, stop_orca_context
  from zoo.orca.data.pandas import read_csv
  from zoo.orca.data import SparkXShards
  from zoo.orca.learn.pytorch import Estimator
  from zoo.orca.learn.metrics import Accuracy
  from zoo.orca.learn.trigger import EveryEpoch
  from zoo.orca.learn.optimizers import SGD
  from zoo.orca.learn.optimizers.schedule import Default
  from zoo.orca import OrcaContext
  import tempfile
label_desc: Use image node_id 2 for calling the TestEstimatorForSpark obj's underlying member method code with example usage: obj.tearDown() without return types