Revert "Turn off propagation for undercloud logger"

This broke logging to a file.

Closes-Bug: 1668709

This reverts commit e28f501142.

Change-Id: Ie085c44ceca1cf3ba62b9afbd7ee927218805ed9
(cherry picked from commit b295fde801)

instack_undercloud/tests/test_undercloud.py

@@ -39,10 +39,6 @@ class BaseTestCase(base.BaseTestCase):
     def setUp(self):
         super(BaseTestCase, self).setUp()
         self.logger = self.useFixture(log.ConfigureLogging()).logger
-        # Otherwise our test logger doesn't see the log messages
-        self.useFixture(
-            fixtures.MockPatch('instack_undercloud.undercloud.LOG.propagate',
-                               True))
 
 
 class TestUndercloud(BaseTestCase):

instack_undercloud/undercloud.py

@@ -501,7 +501,6 @@ def _configure_logging(level, filename):
     formatter = logging.Formatter(DEFAULT_LOG_FORMAT)
     handler.setFormatter(formatter)
     LOG.addHandler(handler)
-    LOG.propagate = False
 
 
 def _load_config():