Use unittest.mock instead of third party mock

Now that we no longer support py27, we can use the standard library
unittest.mock module instead of the third party mock lib.

Change-Id: I9357128c04f2fe0284432c1f6a543d63309efda3
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

kuryr_libnetwork/tests/unit/base.py

@@ -10,8 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
 import netaddr
+from unittest import mock
 
 from neutronclient.v2_0 import client
 from oslotest import base

kuryr_libnetwork/tests/unit/port_driver/drivers/test_nested.py

@@ -10,7 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from oslo_utils import uuidutils
 
 from kuryr.lib import binding

kuryr_libnetwork/tests/unit/port_driver/drivers/test_sriov.py

@@ -11,8 +11,8 @@
 # under the License.
 
 import glob
-import mock
 import os
+from unittest import mock
 
 from oslo_utils import uuidutils
 

kuryr_libnetwork/tests/unit/port_driver/drivers/test_veth.py

@@ -10,7 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from oslo_utils import uuidutils
 
 from kuryr.lib import binding

kuryr_libnetwork/tests/unit/port_driver/drivers/test_vlan.py

@@ -10,7 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from oslo_utils import uuidutils
 
 from kuryr.lib import binding

kuryr_libnetwork/tests/unit/port_driver/test_base.py

@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 
 from kuryr.lib import exceptions
 from kuryr_libnetwork.port_driver import base as d_base

kuryr_libnetwork/tests/unit/port_driver/test_driver.py

@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 
 from oslo_utils import importutils
 

kuryr_libnetwork/tests/unit/test_config.py

@@ -10,8 +10,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 import os
 from six.moves.urllib import parse
 import sys

kuryr_libnetwork/tests/unit/test_external_connectivity.py

@@ -12,8 +12,8 @@
 
 from collections import defaultdict
 from itertools import groupby
-import mock
 from operator import itemgetter
+from unittest import mock
 
 import ddt
 from oslo_serialization import jsonutils

kuryr_libnetwork/tests/unit/test_ipam_pool.py

@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 from neutronclient.common import exceptions
 from oslo_serialization import jsonutils
 

kuryr_libnetwork/tests/unit/test_kuryr.py

@@ -9,7 +9,7 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-import mock
+from unittest import mock
 
 import ddt
 from oslo_serialization import jsonutils

kuryr_libnetwork/tests/unit/test_kuryr_endpoint.py

@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 from neutronclient.common import exceptions as n_exceptions
 from oslo_concurrency import processutils
 from oslo_serialization import jsonutils

kuryr_libnetwork/tests/unit/test_kuryr_existing_network.py

@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import ddt
-import mock
 from neutronclient.common import exceptions as n_exceptions
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils

kuryr_libnetwork/tests/unit/test_kuryr_ipam.py

@@ -11,10 +11,11 @@
 # under the License.
 
 import ipaddress
+from unittest import mock
+
 import six
 
 import ddt
-import mock
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils
 from werkzeug import exceptions as w_exceptions

kuryr_libnetwork/tests/unit/test_kuryr_network.py

@@ -10,9 +10,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 from ddt import data
 from ddt import ddt
-import mock
 from neutronclient.common import exceptions
 from oslo_serialization import jsonutils
 from oslo_utils import uuidutils