Use neutron-lib modules for neutron_taas

Use model_base and exceptions from neutron-lib to remove
DeprecationWarning.

Change-Id: Idcc40332909bf24c46c926e7337070ebbc59bde4

neutron_taas/db/taas_db.py

@@ -19,8 +19,8 @@ from sqlalchemy import orm
 from sqlalchemy.orm import exc
 
 from neutron.db import common_db_mixin as base_db
-from neutron.db import model_base
 from neutron import manager
+from neutron_lib.db import model_base
 from neutron_taas.extensions import taas
 from oslo_log import log as logging
 from oslo_utils import uuidutils

neutron_taas/extensions/taas.py

@@ -18,8 +18,8 @@ import abc
 from neutron.api import extensions
 from neutron.api.v2 import attributes as attr
 from neutron.api.v2 import resource_helper
-from neutron.common import exceptions as qexception
 from neutron.services import service_base
+from neutron_lib import exceptions as qexception
 
 from neutron_taas.common import constants
 

neutron_taas/services/taas/service_drivers/taas_rpc.py

@@ -14,8 +14,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from neutron.common import exceptions as n_exc
 from neutron.common import rpc as n_rpc
+from neutron_lib import exceptions as n_exc
 from neutron_taas.common import topics
 from neutron_taas.extensions import taas as taas_ex
 from neutron_taas.services.taas import service_drivers

neutron_taas/services/taas/taas_plugin.py

@@ -14,10 +14,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from neutron.common import exceptions as n_exc
 from neutron.db import servicetype_db as st_db
 from neutron.services import provider_configuration as pconf
 from neutron.services import service_base
+from neutron_lib import exceptions as n_exc
 
 from neutron_taas.common import constants
 from neutron_taas.db import taas_db