Enable ovsdb debug messages in functional and fullstack

Enable the configuration flag "ovsdb_debug" for functional and
fullstack tests. If enable, NeutronOvsdbIdl won't define any log
level when setting up the logger; if not "max_level" is defined,
all messages are logged.

Change-Id: I1185c1ca2556e2aed27051efd98a1d141f5298c9
Related-Bug: #1802640

neutron/common/config.py

@@ -43,7 +43,6 @@ EXTRA_LOG_LEVEL_DEFAULTS = [
     'OfctlService=INFO',
     'os_ken.base.app_manager=INFO',
     'os_ken.controller.controller=INFO',
-    'ovsdbapp.backend.ovs_idl.vlog=INFO'
 ]
 
 # Register the configuration options

neutron/tests/fullstack/resources/config.py

@@ -204,6 +204,7 @@ class OVSConfigFixture(ConfigFixture):
                 'integration_bridge': self._generate_integration_bridge(),
                 'bridge_mappings': '%s:%s' % (PHYSICAL_NETWORK_NAME, ext_dev),
                 'of_inactivity_probe': '0',
+                'ovsdb_debug': 'True',
             },
             'securitygroup': {
                 'firewall_driver': host_desc.firewall_driver,

neutron/tests/functional/base.py

@@ -92,7 +92,9 @@ class BaseSudoTestCase(BaseLoggingTestCase):
     def _override_default_config():
         # NOTE(ralonsoh): once https://review.opendev.org/#/c/641681/ is
         # merged, we should increase the default value of those new parameters.
-        ovs_agent_opts = [('ovsdb_timeout', 30, 'OVS')]
+        ovs_agent_opts = [('ovsdb_timeout', 30, 'OVS'),
+                          ('ovsdb_debug', True, 'OVS'),
+                          ]
         ovs_agent_decorator = config_decorator(
             ovs_conf.register_ovs_agent_opts, ovs_agent_opts)
         mock.patch.object(ovs_conf, 'register_ovs_agent_opts',