Use unittest.mock instead of third party mock

Now that we no longer support py27, we can use the standard library
unittest.mock module instead of the third party mock lib.

Change-Id: Idc319f3f8a3ddd57cba91e4cefc66dbb18d5cc22
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

doc/requirements.txt

@@ -13,7 +13,6 @@ sphinxcontrib-apidoc>=0.2.0  # BSD
 sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD
 
 # For autodoc builds
-mock>=2.0.0 # BSD
 oslotest>=3.2.0 # Apache-2.0
 requests-mock>=1.2.0 # Apache-2.0
 testresources>=2.0.0 # Apache-2.0/BSD

keystonemiddleware/tests/unit/audit/test_audit_middleware.py

@@ -11,10 +11,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
 import uuid
 
 import fixtures
-import mock
 import webob
 
 from keystonemiddleware.tests.unit.audit import base

keystonemiddleware/tests/unit/audit/test_audit_oslo_messaging.py

@@ -10,7 +10,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 
 from keystonemiddleware import audit
 from keystonemiddleware.tests.unit.audit import base

keystonemiddleware/tests/unit/audit/test_logging_notifier.py

@@ -10,8 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import fixtures
-import mock
 
 from keystonemiddleware.tests.unit.audit import base
 

keystonemiddleware/tests/unit/auth_token/test_auth_token_middleware.py

@@ -15,6 +15,7 @@
 import datetime
 import os
 import time
+from unittest import mock
 import uuid
 
 import fixtures
@@ -22,7 +23,6 @@ from keystoneauth1 import exceptions as ksa_exceptions
 from keystoneauth1 import fixture
 from keystoneauth1 import loading
 from keystoneauth1 import session
-import mock
 import oslo_cache
 from oslo_log import log as logging
 from oslo_serialization import jsonutils

keystonemiddleware/tests/unit/auth_token/test_base_middleware.py

@@ -11,10 +11,10 @@
 # under the License.
 
 import datetime
+from unittest import mock
 import uuid
 
 from keystoneauth1 import fixture
-import mock
 import testtools
 import webob
 

keystonemiddleware/tests/unit/auth_token/test_config.py

@@ -10,9 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
 import uuid
 
-import mock
 from oslo_config import cfg
 from oslotest import createfile
 

keystonemiddleware/tests/unit/auth_token/test_connection_pool.py

@@ -11,8 +11,8 @@
 # under the License.
 
 import time
+from unittest import mock
 
-import mock
 from oslo_cache import _memcache_pool
 from six.moves import queue
 import testtools

keystonemiddleware/tests/unit/test_ec2_token_middleware.py

@@ -12,7 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from oslo_serialization import jsonutils
 import requests
 import six

keystonemiddleware/tests/unit/test_s3_token_middleware.py

@@ -12,8 +12,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
+
 import fixtures
-import mock
 from oslo_serialization import jsonutils
 import requests
 from requests_mock.contrib import fixture as rm_fixture

keystonemiddleware/tests/unit/utils.py

@@ -12,11 +12,11 @@
 
 import sys
 import time
+from unittest import mock
 import uuid
 import warnings
 
 import fixtures
-import mock
 from oslo_log import log as logging
 import oslotest.base as oslotest
 import requests

test-requirements.txt

@@ -8,7 +8,6 @@ flake8-docstrings==0.2.1.post1 # MIT
 coverage!=4.4,>=4.0 # Apache-2.0
 cryptography>=2.1 # BSD/Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
-mock>=2.0.0 # BSD
 oslotest>=3.2.0 # Apache-2.0
 requests-mock>=1.2.0 # Apache-2.0
 stevedore>=1.20.0 # Apache-2.0