functional tests: don't run journal timer

don't run journal timer for functional tests.
If tearDown/setUp() is called during journal thread is running
by timer, journal thread may be upset by sudden db transaction and
abort.

Change-Id: Ic34a703ac7ceb877175fc299b7e0d7b39ba6db63
Closes-bug: #1700850

networking_odl/tests/functional/base.py

@@ -16,6 +16,7 @@
 
 import functools
 
+import mock
 from neutron.common import utils
 from neutron.plugins.ml2 import config
 from neutron.tests.unit.plugins.ml2 import test_plugin
@@ -24,6 +25,7 @@ from networking_odl.common import client
 from networking_odl.common import constants as odl_const
 from networking_odl.common import utils as odl_utils
 from networking_odl.db import db
+from networking_odl.journal import journal
 from networking_odl.tests.unit import test_base_db
 
 
@@ -90,6 +92,14 @@ class OdlTestsBase(object):
 
 
 class V2DriverAdjustment(test_base_db.ODLBaseDbTestCase):
+    def setUp(self):
+        # NOTE(yamahata): for functional test, timer isn't needed.
+        # and if tearDown/setUp() is called during journal thread is running
+        # by timer, journal thread may be upset by sudden db transaction.
+        mock.patch.object(journal.OpenDaylightJournalThread,
+                          '_start_sync_timer')
+        super(V2DriverAdjustment, self).setUp()
+
     def get_odl_resource(self, resource_type, resource):
         def no_journal_rows():
             pending_rows = db.get_all_db_rows_by_state(