Replace mock with unittest.mock

mock module has been deprecated in favor of unittest.mock
which is part of the standard python library.

This review removes mock as a third party dependency, and
updates all unittest imports to use unittest.mock instead.

nova-api-proxy had mock as a test requirement, however it
was not using it.

This change has no impact on runtime code.

Test Plan:
  PASS: tox passing for nfv
  PASS: build-pkgs -p nfv
  PASS: tox passing for nova-api-proxy
  PASS: build-pkgs -p nova-api-proxy

Story: 2010531
Task: 47142

Signed-off-by: Al Bailey <al.bailey@windriver.com>
Change-Id: I991d07e87fbdc7fecc4e790550df2472b9b5b24b

nfv/nfv-tests/nfv_unit_tests/tests/test_dhcp_network_rebalance_randomized.py

@@ -1,10 +1,10 @@
 #
-# Copyright (c) 2015-2016 Wind River Systems, Inc.
+# Copyright (c) 2015-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
 import random
+from unittest import mock
 
 from nfv_vim.network_rebalance._dhcp_rebalance import _add_network_to_dhcp_agent_callback_body  # noqa: H501
 from nfv_vim.network_rebalance._dhcp_rebalance import _DHCPRebalance

nfv/nfv-tests/nfv_unit_tests/tests/test_fw_update_strategy.py

@@ -1,10 +1,10 @@
 #
-# Copyright (c) 2020 Wind River Systems, Inc.
+# Copyright (c) 2020-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
 
-import mock
+from unittest import mock
 import uuid
 
 from nfv_vim import nfvi

nfv/nfv-tests/nfv_unit_tests/tests/test_instance_director.py

@@ -1,9 +1,9 @@
 #
-# Copyright (c) 2015-2016 Wind River Systems, Inc.
+# Copyright (c) 2015-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
+from unittest import mock
 import uuid
 
 from nfv_vim import nfvi

nfv/nfv-tests/nfv_unit_tests/tests/test_kube_rootca_update_strategy.py

@@ -1,9 +1,9 @@
 #
-# Copyright (c) 2020-2021 Wind River Systems, Inc.
+# Copyright (c) 2020-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
+from unittest import mock
 import uuid
 
 from nfv_common import strategy as common_strategy

nfv/nfv-tests/nfv_unit_tests/tests/test_kube_upgrade_strategy.py

@@ -1,9 +1,9 @@
 #
-# Copyright (c) 2020-2021 Wind River Systems, Inc.
+# Copyright (c) 2020-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
+from unittest import mock
 import uuid
 
 from nfv_common import strategy as common_strategy

nfv/nfv-tests/nfv_unit_tests/tests/test_network_rebalance.py

@@ -1,10 +1,10 @@
 #
-# Copyright (c) 2015-2016 Wind River Systems, Inc.
+# Copyright (c) 2015-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
 import random
+from unittest import mock
 
 from nfv_vim.network_rebalance._network_rebalance import _L3Rebalance
 from nfv_vim.network_rebalance._network_rebalance import _reschedule_down_agent

nfv/nfv-tests/nfv_unit_tests/tests/test_network_rebalance_randomized.py

@@ -1,10 +1,10 @@
 #
-# Copyright (c) 2015-2016 Wind River Systems, Inc.
+# Copyright (c) 2015-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
 import random
+from unittest import mock
 
 from nfv_vim.network_rebalance._network_rebalance import _add_router_to_agent_callback_body  # noqa: H501
 from nfv_vim.network_rebalance._network_rebalance import _get_agent_routers_callback_body  # noqa: H501

nfv/nfv-tests/nfv_unit_tests/tests/test_nfv_client.py

@@ -1,11 +1,11 @@
 #
-# Copyright
+# Copyright (c) 2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
 import copy
-import mock
 import os
+from unittest import mock
 
 from nfv_client import shell
 

nfv/nfv-tests/nfv_unit_tests/tests/test_plugin_kubernetes_client.py

@@ -1,4 +1,6 @@
 #
+# Copyright (c) 2023 Wind River Systems, Inc.
+#
 # SPDX-License-Identifier: Apache-2.0
 #
 # Copyright (C) 2019 Intel Corporation
@@ -6,7 +8,7 @@
 
 import kubernetes
 from kubernetes.client.rest import ApiException
-import mock
+from unittest import mock
 
 from nfv_plugins.nfvi_plugins.clients import kubernetes_client
 

nfv/nfv-tests/nfv_unit_tests/tests/test_sw_patch_strategy.py

@@ -1,9 +1,9 @@
 #
-# Copyright (c) 2016-2020 Wind River Systems, Inc.
+# Copyright (c) 2016-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
+from unittest import mock
 import uuid
 
 from nfv_common import strategy as common_strategy

nfv/nfv-tests/nfv_unit_tests/tests/test_sw_upgrade_strategy.py

@@ -1,10 +1,10 @@
 #
-# Copyright (c) 2016-2020 Wind River Systems, Inc.
+# Copyright (c) 2016-2023 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-import mock
 import testtools
+from unittest import mock
 import uuid
 
 from nfv_common import strategy as common_strategy

nfv/test-requirements.txt

@@ -5,6 +5,5 @@ hacking>=1.1.0,<=2.0.0 # Apache-2.0
 bandit
 coverage>=3.6
 fixtures>=3.0.0 # Apache-2.0/BSD
-mock>=2.0.0 # BSD
 pylint
 testtools>=2.2.0 # MIT

nfv/tox.ini

@@ -128,7 +128,6 @@ commands = bandit --ini tox.ini -f txt -r {[nfv]nfv_base_dir}
 deps = {[nfv]deps}
        coverage
        fixtures
-       mock
        stestr
        testtools
 setenv = PYTHONDONTWRITEBYTECODE=True
@@ -141,7 +140,6 @@ commands = cp -v {[nfv]nfv_base_dir}/nfv-tests/nfv_unit_tests/test_data/nfv_vim_
 deps = {[nfv]deps}
        coverage
        fixtures
-       mock
        stestr
        testtools
 setenv =

nova-api-proxy/test-requirements.txt

@@ -5,5 +5,4 @@ hacking>=1.1.0,<=2.0.0 # Apache-2.0
 bandit<1.6.0;python_version>="3.0"
 coverage>=3.6
 fixtures>=3.0.0 # Apache-2.0/BSD
-mock>=2.0.0 # BSD
 pylint