Use unittest.mock instead of mock

The mock third party library was needed for mock support in py2
runtimes. Since we now only support py36 and later, we can use the
standard lib unittest.mock module instead.

Change-Id: Ib3ca91e93db260e081c43d236d5d6fae5a2adfd7

lower-constraints.txt

@@ -56,7 +56,6 @@ Mako==1.0.7
 marathon==0.8.6
 MarkupSafe==1.0
 mccabe==0.2.1
-mock==2.0.0
 monotonic==1.4
 mox3==0.25.0
 msgpack==0.5.6

magnum/tests/unit/common/cert_manager/test_barbican.py

@@ -18,7 +18,7 @@ import uuid
 from barbicanclient.v1 import client as barbican_client
 from barbicanclient.v1 import containers
 from barbicanclient.v1 import secrets
-from mock import patch
+from unittest.mock import patch
 
 from magnum.common.cert_manager import barbican_cert_manager as bcm
 from magnum.common.cert_manager import cert_manager

magnum/tests/unit/common/test_urlfetch.py

@@ -10,8 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 from oslo_config import cfg
 

magnum/tests/unit/conductor/handlers/common/test_trust_manager.py

@@ -12,8 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 from magnum.common import exception
 from magnum.conductor.handlers.common import trust_manager

magnum/tests/unit/conductor/handlers/test_cluster_conductor.py

@@ -15,11 +15,11 @@
 # under the License.
 
 from unittest import mock
+from unittest.mock import patch
 
 import six
 
 from heatclient import exc
-from mock import patch
 from oslo_service import loopingcall
 from pycadf import cadftaxonomy as taxonomy
 

magnum/tests/unit/conductor/handlers/test_k8s_cluster_conductor.py

@@ -12,8 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 import magnum.conf
 from magnum.drivers.k8s_coreos_v1 import driver as k8s_coreos_dr

magnum/tests/unit/conductor/handlers/test_mesos_cluster_conductor.py

@@ -12,8 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 from magnum.drivers.heat import driver as heat_driver
 from magnum.drivers.mesos_ubuntu_v1 import driver as mesos_dr

magnum/tests/unit/conductor/handlers/test_nodegroup_conductor.py

@@ -13,8 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 from heatclient import exc
 

magnum/tests/unit/conductor/handlers/test_swarm_cluster_conductor.py

@@ -12,8 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 import magnum.conf
 from magnum.drivers.heat import driver as heat_driver

magnum/tests/unit/conductor/test_utils.py

@@ -12,8 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 from magnum.conductor import utils
 from magnum import objects

magnum/tests/unit/drivers/test_heat_driver.py

@@ -10,8 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from mock import patch
 from unittest import mock
+from unittest.mock import patch
 
 from heatclient import exc as heatexc
 from oslo_utils import uuidutils

magnum/tests/unit/drivers/test_k8s_fedora_atomic_v1_driver.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from mock import patch
+from unittest.mock import patch
 
 from magnum.common import exception
 from magnum.drivers.k8s_fedora_atomic_v1 import driver