Revert "tests: fix intermittent failure"

This reverts commit 5a39141.

Author: oakbani

optimizely/config_manager.py

@@ -299,7 +299,6 @@ def _run(self):
         try:
           while self.is_running:
               self.fetch_datafile()
-              self.logger.debug("This thread is running")
               time.sleep(self.update_interval)
         except (OSError, OverflowError) as err:
             self.logger.error('Error in time.sleep. '

tests/test_config_manager.py

@@ -14,7 +14,6 @@
 import json
 import mock
 import requests
-from six.moves import queue
 
 from optimizely import config_manager
 from optimizely import exceptions as optimizely_exceptions
@@ -279,15 +278,7 @@ def test_fetch_datafile(self, _):
 
     def test_is_running(self, _):
         """ Test that polling thread is running after instance of PollingConfigManager is created. """
-        blocking_queue = queue.Queue()
-        with mock.patch('optimizely.config_manager.PollingConfigManager.fetch_datafile',
-                        side_effect=lambda: blocking_queue.put_nowait('fetch_datafile called')) as mock_fetch_datafile:
-            project_config_manager = config_manager.PollingConfigManager(
-                sdk_key='some_key', update_interval=1)
-
-        self.assertTrue(project_config_manager.is_running)
-        # Wait for 5 seconds before asserting mock
-        try:
-            blocking_queue.get(True, 5)
-        except queue.Empty:
-            mock_fetch_datafile.assert_called_with()
+        with mock.patch('optimizely.config_manager.PollingConfigManager.fetch_datafile') as mock_fetch_datafile:
+            project_config_manager = config_manager.PollingConfigManager(sdk_key='some_key')
+            self.assertTrue(project_config_manager.is_running)
+        mock_fetch_datafile.assert_called_with()