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: Ie5ee60235bafc1e7b3461dee29b83fb62125178e
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

masakarimonitors/tests/unit/ha/test_masakari.py

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import testtools
+from unittest import mock
 import uuid
 
 import eventlet

masakarimonitors/tests/unit/hostmonitor/host_handler/test_handle_host.py

@@ -12,9 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import socket
 import testtools
+from unittest import mock
 from xml.etree import ElementTree
 
 import eventlet

masakarimonitors/tests/unit/hostmonitor/host_handler/test_parse_cib_xml.py

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import testtools
+from unittest import mock
 from xml.etree import ElementTree
 
 import eventlet

masakarimonitors/tests/unit/hostmonitor/test_host.py

@@ -12,9 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import os
 import testtools
+from unittest import mock
 
 from stevedore import driver
 

masakarimonitors/tests/unit/instancemonitor/libvirt_handler/test_callback.py

@@ -12,9 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import socket
 import testtools
+from unittest import mock
 import uuid
 
 import eventlet

masakarimonitors/tests/unit/instancemonitor/libvirt_handler/test_eventfilter.py

@@ -12,10 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import socket
 import testtools
 import threading
+from unittest import mock
 import uuid
 
 import eventlet

masakarimonitors/tests/unit/instancemonitor/test_instance.py

@@ -13,10 +13,10 @@
 # limitations under the License.
 
 import libvirt
-import mock
 import testtools
 import threading
 import time
+from unittest import mock
 import uuid
 
 import eventlet

masakarimonitors/tests/unit/introspectiveinstancemonitor/test_monitor_manager.py

@@ -14,8 +14,8 @@
 
 import eventlet
 import libvirt
-import mock
 import testtools
+from unittest import mock
 
 from masakarimonitors.introspectiveinstancemonitor import instance
 

masakarimonitors/tests/unit/introspectiveinstancemonitor/test_qemu_utils.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 
 import libvirt
-import mock
 import testtools
+from unittest import mock
 import uuid
 
 

masakarimonitors/tests/unit/processmonitor/process_handler/test_handle_process.py

@@ -12,9 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import socket
 import testtools
+from unittest import mock
 
 import eventlet
 from oslo_utils import timeutils

masakarimonitors/tests/unit/processmonitor/test_process.py

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
 import testtools
+from unittest import mock
 import yaml
 
 import eventlet

masakarimonitors/tests/unit/test_hacking.py

@@ -13,8 +13,8 @@
 #    under the License.
 
 import textwrap
+from unittest import mock
 
-import mock
 import pycodestyle
 import testtools