Migrate to oslo.utils

The following modules are removed:
  - excutils,
  - importutils,
  - network_utils,
  - strutils,
  - timeutils.

Closes-Bug: #1385355
Change-Id: I1f34f17f5dbf37032584008f27e65d4dc4d475f4

neutron/db/vpn/vpn_db.py

@@ -14,6 +14,7 @@
 #    under the License.
 
 import netaddr
+from oslo.utils import excutils
 import sqlalchemy as sa
 from sqlalchemy import orm
 from sqlalchemy.orm import exc
@@ -27,7 +28,6 @@ from neutron.db import models_v2
 from neutron.db.vpn import vpn_validator
 from neutron.extensions import vpnaas
 from neutron import manager
-from neutron.openstack.common import excutils
 from neutron.openstack.common.gettextutils import _LW
 from neutron.openstack.common import log as logging
 from neutron.openstack.common import uuidutils

neutron/services/vpn/agent.py

@@ -12,11 +12,12 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
+
 from oslo.config import cfg
+from oslo.utils import importutils
 
 from neutron.agent import l3_agent
 from neutron.extensions import vpnaas
-from neutron.openstack.common import importutils
 
 vpn_agent_opts = [
     cfg.MultiStrOpt(

openstack-common.conf

@@ -3,11 +3,9 @@
 module=cache
 module=context
 module=eventlet_backdoor
-module=excutils
 module=fileutils
 module=fixture
 module=gettextutils
-module=importutils
 module=install_venv_common
 module=local
 module=lockutils
@@ -19,15 +17,12 @@ module=middleware.correlation_id
 module=middleware.debug
 module=middleware.request_id
 module=middleware.sizelimit
-module=network_utils
 module=periodic_task
 module=policy
 module=processutils
 module=service
-module=strutils
 module=systemd
 module=threadgroup
-module=timeutils
 module=uuidutils
 
 # The base module to hold the copy of openstack.common