Using unittest.mock instead of mock

We're only support py3 now, so using the standard library
unittest.mock instead of the mock module.

Change-Id: Ie827780a950cf66030ee1a688674e66ca7f3479c

lower-constraints.txt

@@ -47,7 +47,6 @@ logutils==0.3.5
 Mako==0.4.0
 MarkupSafe==1.0
 mccabe==0.2.1
-mock==2.0.0
 monotonic==0.6
 mox3==0.20.0
 msgpack-python==0.4.0

neutron_vpnaas/tests/functional/common/test_scenario.py

@@ -13,8 +13,8 @@
 import collections
 import copy
 import functools
+from unittest import mock
 
-import mock
 import netaddr
 from neutron.agent.common import ovs_lib
 from neutron.agent.l3 import agent as neutron_l3_agent

neutron_vpnaas/tests/functional/openswan/test_openswan_driver.py

@@ -13,7 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
+from unittest import mock
+
 from neutron.agent.linux import ip_lib
 from neutron.agent.linux import utils as linux_utils
 

neutron_vpnaas/tests/functional/strongswan/test_strongswan_driver.py

@@ -14,8 +14,8 @@
 #    under the License.
 
 import os
+from unittest import mock
 
-import mock
 from neutron.agent.l3 import agent as neutron_l3_agent
 from neutron.agent.l3 import legacy_router
 from neutron.conf.agent.l3 import config as l3_config

neutron_vpnaas/tests/unit/db/vpn/test_vpn_db.py

@@ -17,8 +17,8 @@
 import contextlib
 import copy
 import os
+from unittest import mock
 
-import mock
 from neutron.api import extensions as api_extensions
 from neutron.common import config
 from neutron.db import agentschedulers_db

neutron_vpnaas/tests/unit/db/vpn/test_vpn_validator.py

@@ -14,8 +14,8 @@
 #    under the License.
 
 import socket
+from unittest import mock
 
-import mock
 from neutron.db import l3_db
 from neutron_lib import context as n_ctx
 from neutron_lib import exceptions as nexception

neutron_vpnaas/tests/unit/extensions/test_vpn_endpoint_groups.py

@@ -13,8 +13,8 @@
 #    under the License.
 
 import copy
+from unittest import mock
 
-import mock
 from oslo_utils import uuidutils
 from webob import exc
 

neutron_vpnaas/tests/unit/extensions/test_vpnaas.py

@@ -14,8 +14,8 @@
 #    under the License.
 
 import copy
+from unittest import mock
 
-import mock
 from neutron.tests.unit.api.v2 import test_base as test_api_v2
 from neutron_lib.plugins import constants as nconstants
 from oslo_utils import uuidutils

neutron_vpnaas/tests/unit/services/vpn/common/test_netns_wrapper.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
+from unittest import mock
 
 from neutron.tests import base
 from neutron_vpnaas.services.vpn.common import netns_wrapper as nswrap

neutron_vpnaas/tests/unit/services/vpn/device_drivers/test_ipsec.py

@@ -17,8 +17,8 @@ import difflib
 import io
 import os
 import socket
+from unittest import mock
 
-import mock
 import netaddr
 from neutron.agent.l3 import dvr_edge_router
 from neutron.agent.l3 import dvr_snat_ns

neutron_vpnaas/tests/unit/services/vpn/service_drivers/test_ipsec.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
+from unittest import mock
 
 from neutron.db import servicetype_db as st_db
 from neutron_lib import context as n_ctx

neutron_vpnaas/tests/unit/services/vpn/test_plugin.py

@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 import contextlib
+from unittest import mock
 
-import mock
 from neutron.db import servicetype_db as st_db
 from neutron.services.flavors import flavors_plugin
 from neutron.tests.unit.db import test_agentschedulers_db

neutron_vpnaas/tests/unit/services/vpn/test_vpn_service.py

@@ -13,7 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
+from unittest import mock
+
 from neutron_lib.callbacks import registry
 from oslo_config import cfg
 from oslo_utils import uuidutils

test-requirements.txt

@@ -6,7 +6,6 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 flake8-import-order==0.12 # LGPLv3
-mock>=2.0.0 # BSD
 pylint==2.3.0 # GPLv2
 requests-mock>=1.2.0 # Apache-2.0
 sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4' # BSD