[Culprit-finder] Refactor findit testcase and move it to libs.

appengine/findit/waterfall/test/wf_testcase.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from google.appengine.api import users
 
 import copy
 
 import gae_ts_mon
 
-from common.findit_testcase import FinditTestCase
+from libs.testcase import TestCase
 from model.wf_config import FinditConfig
 
 
 _DEFAULT_STEPS_FOR_MASTERS_RULES = {
     'supported_masters': {
         'm': {
             'check_global': True,
         },
         'm3': {
             'check_global': True,
@@ skipping 102 matching lines @@
     'steps_for_masters_rules': _DEFAULT_STEPS_FOR_MASTERS_RULES,
     'builders_to_trybots': _DEFAULT_TRY_BOT_MAPPING,
     'try_job_settings': _DEFAULT_TRY_JOB_SETTINGS,
     'swarming_settings': _DEFAULT_SWARMING_SETTINGS,
     'download_build_data_settings': _DEFAULT_DOWNLOAD_BUILD_DATA_SETTINGS,
     'action_settings': _DEFAULT_ACTION_SETTINGS,
     'check_flake_settings': _DEFAULT_CHECK_FLAKE_SETTINGS,
 }
 
 
-class WaterfallTestCase(FinditTestCase):  # pragma: no cover.
+class WaterfallTestCase(TestCase):  # pragma: no cover.
 
   def UpdateUnitTestConfigSettings(self, config_property=None,
                                    override_data=None):
     """Sets up Findit's config for unit tests.
 
     Args:
       config_property: The name of the config property to update.
       override_data: A dict to override any default settings.
     """
     config_data = DEFAULT_CONFIG_DATA
 
     if config_property and override_data:
       config_data = copy.deepcopy(DEFAULT_CONFIG_DATA)
       config_data[config_property].update(override_data)
 
     FinditConfig.Get().Update(users.User(email='admin@chromium.org'), True,
                               **config_data)
 
   def setUp(self):
     super(WaterfallTestCase, self).setUp()
     self.UpdateUnitTestConfigSettings()
     self.maxDiff = None
     gae_ts_mon.reset_for_unittest(disable=True)