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/template/test_safe_eval.py

@@ -22,8 +22,8 @@ __metaclass__ = type
 import sys
 from collections import defaultdict
 
-from ansible.compat.tests import unittest
-from ansible.compat.tests.mock import patch, MagicMock
+from units.compat import unittest
+from units.compat.mock import patch, MagicMock
 from ansible.template.safe_eval import safe_eval
 
 

test/units/template/test_templar.py

@@ -21,8 +21,8 @@ __metaclass__ = type
 
 from jinja2.runtime import Context
 
-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 import constants as C
 from ansible.errors import AnsibleError, AnsibleUndefinedVariable

test/units/template/test_template_utilities.py

@@ -20,7 +20,7 @@ from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
 import jinja2
-from ansible.compat.tests import unittest
+from units.compat import unittest
 
 from ansible.template import _escape_backslashes, _count_newlines_from_end
 

test/units/template/test_vars.py

@@ -19,8 +19,8 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
-from ansible.compat.tests import unittest
-from ansible.compat.tests.mock import MagicMock
+from units.compat import unittest
+from units.compat.mock import MagicMock
 
 from ansible.template.vars import AnsibleJ2Vars