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/lookup/test_conjur_variable.py

@@ -22,7 +22,7 @@ __metaclass__ = type
 
 
 import pytest
-from ansible.compat.tests.mock import MagicMock
+from units.compat.mock import MagicMock
 from ansible.errors import AnsibleError
 from ansible.module_utils.six.moves import http_client
 from ansible.plugins.lookup import conjur_variable

test/units/plugins/lookup/test_ini.py

@@ -20,7 +20,7 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
-from ansible.compat.tests import unittest
+from units.compat import unittest
 from ansible.plugins.lookup.ini import _parse_params
 
 

test/units/plugins/lookup/test_lastpass.py

@@ -21,8 +21,8 @@ __metaclass__ = type
 
 from argparse import ArgumentParser
 
-from ansible.compat.tests import unittest
-from ansible.compat.tests.mock import patch
+from units.compat import unittest
+from units.compat.mock import patch
 
 from ansible.errors import AnsibleError
 from ansible.module_utils import six

test/units/plugins/lookup/test_onepassword.py

@@ -15,8 +15,8 @@ except ImportError:
 from argparse import ArgumentParser
 
 
-from ansible.compat.tests import unittest
-from ansible.compat.tests.mock import patch
+from units.compat import unittest
+from units.compat.mock import patch
 from ansible.errors import AnsibleError
 from ansible.plugins.lookup.onepassword import OnePass, LookupModule
 from ansible.plugins.lookup.onepassword_raw import LookupModule as OnePasswordRawLookup

test/units/plugins/lookup/test_password.py

@@ -24,8 +24,8 @@ import passlib
 from passlib.handlers import pbkdf2
 from units.mock.loader import DictDataLoader
 
-from ansible.compat.tests import unittest
-from ansible.compat.tests.mock import mock_open, patch
+from units.compat import unittest
+from units.compat.mock import mock_open, patch
 from ansible.errors import AnsibleError
 from ansible.module_utils.six import text_type
 from ansible.module_utils.six.moves import builtins