Techdebt: replace mock with unittest.mock (#5775)

tests/test_cognitoidentity/test_cognitoidentity.py

@@ -1,5 +1,5 @@
 import boto3
-import mock
+from unittest import mock
 import sure  # noqa # pylint: disable=unused-import
 from botocore.exceptions import ClientError
 from datetime import datetime

tests/test_cognitoidp/test_cognitoidp.py

@@ -5,7 +5,7 @@ import os
 import random
 import re
 
-import mock
+from unittest import mock
 import moto.cognitoidp.models
 import requests
 import hmac

tests/test_core/test_mock_regions.py

@@ -1,5 +1,5 @@
 import boto3
-import mock
+from unittest import mock
 import os
 import pytest
 from moto import mock_dynamodb, mock_sns, settings

tests/test_core/test_settings.py

@@ -1,5 +1,5 @@
 import os
-import mock
+from unittest import mock
 import pytest
 import sure  # noqa # pylint: disable=unused-import
 

tests/test_ecs/test_ecs_boto3.py

@@ -2,7 +2,7 @@ from datetime import datetime
 
 from botocore.exceptions import ClientError
 import boto3
-import mock
+from unittest import mock
 import sure  # noqa # pylint: disable=unused-import
 import json
 import os

tests/test_eks/test_eks.py

@@ -2,7 +2,7 @@ from copy import deepcopy
 from unittest import SkipTest
 
 import boto3
-import mock
+from unittest import mock
 import pytest
 import sure  # noqa # pylint: disable=unused-import
 from botocore.exceptions import ClientError