Move unit test compat code out of lib/ansible/. (#46996)

* Move ansible.compat.tests to test/units/compat/.
* Fix unit test references to ansible.compat.tests.
* Move builtins compat to separate file.
* Fix classification of test/units/compat/ dir.

test/units/plugins/action/test_action.py

@@ -24,8 +24,8 @@ import os
 import re
 
 from ansible import constants as C
-from ansible.compat.tests import unittest
-from ansible.compat.tests.mock import patch, MagicMock, mock_open
+from units.compat import unittest
+from units.compat.mock import patch, MagicMock, mock_open
 
 from ansible.errors import AnsibleError
 from ansible.module_utils.six import text_type

test/units/plugins/action/test_raw.py

@@ -21,8 +21,8 @@ __metaclass__ = type
 import os
 
 from ansible.errors import AnsibleActionFail
-from ansible.compat.tests import unittest
-from ansible.compat.tests.mock import patch, MagicMock, Mock
+from units.compat import unittest
+from units.compat.mock import patch, MagicMock, Mock
 from ansible.plugins.action.raw import ActionModule
 from ansible.playbook.task import Task
 from ansible.plugins.loader import connection_loader

test/units/plugins/action/test_synchronize.py

@@ -19,7 +19,7 @@ import yaml
 from pprint import pprint
 
 import ansible.plugins
-from ansible.compat.tests.mock import patch, MagicMock
+from units.compat.mock import patch, MagicMock
 from ansible.plugins.action.synchronize import ActionModule
 
 

test/units/plugins/action/test_win_updates.py

@@ -8,7 +8,7 @@ __metaclass__ = type
 
 import pytest
 
-from ansible.compat.tests.mock import patch, MagicMock, mock_open
+from units.compat.mock import patch, MagicMock, mock_open
 from ansible.plugins.action.win_updates import ActionModule
 from ansible.playbook.task import Task