Change BaseLoggingTestCase setup for logging

96eae957b0 changed initialization for base
tests but logging configuration gets lost after super().setUp()

Revert this part as it is not needed in the end for tests to pass
properly

Change-Id: I4a8ca76920b0f174b37171c09653b6755a2dda5c
Closes-Bug: #1915272

neutron/tests/functional/base.py

@@ -69,6 +69,7 @@ def config_decorator(method_to_decorate, config_tuples):
 
 class BaseLoggingTestCase(base.BaseTestCase):
     def setUp(self):
+        super().setUp()
         # NOTE(slaweq): Because of issue with stestr and Python3, we need
         # to avoid too much output to be produced during tests, so we will
         # ignore python warnings here
@@ -76,8 +77,6 @@ class BaseLoggingTestCase(base.BaseTestCase):
         base.setup_test_logging(
             cfg.CONF, DEFAULT_LOG_DIR, "%s.txt" % self.id())
         cfg.CONF.set_override('use_helper_for_ns_read', False, group='AGENT')
-        super().setUp()
-        warnings.simplefilter("ignore")  # warnings get reset by super
 
 
 class BaseSudoTestCase(BaseLoggingTestCase):