Fix mock module import synthax

coriolis/tests/conductor/rpc/test_server.py

@@ -2,7 +2,7 @@
 # All Rights Reserved.
 
 import ddt
-import mock
+from unittest import mock
 
 from coriolis.conductor.rpc import server
 from coriolis import exception

coriolis/tests/db/test_api.py

@@ -1,7 +1,7 @@
 # Copyright 2017 Cloudbase Solutions Srl
 # All Rights Reserved.
 
-import mock
+from unittest import mock
 
 from coriolis.db import api
 from coriolis import exception

coriolis/tests/providers/base.py

@@ -1,6 +1,6 @@
 """Defines base classes for all provider tests."""
 
-import mock
+from unittest import mock
 
 from coriolis.tests import test_base
 from coriolis.tests import testutils

coriolis/tests/test_schemas.py

@@ -5,7 +5,7 @@ import json
 
 import jinja2
 import jsonschema
-import mock
+from unittest import mock
 
 from coriolis import schemas
 from coriolis.tests import test_base

coriolis/tests/testutils.py

@@ -1,6 +1,6 @@
 """Defines general utilities for all tests."""
 
-import mock
+from unittest import mock
 
 
 def identity_dec(item, *args, **kwargs):