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: Ib2843c62ff29b269139981f067ae6afcab624799
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

monasca_api/tests/config.py

@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 
 from monasca_api import config
 from monasca_api.tests import base

monasca_api/tests/db/test_fingerprint.py

@@ -13,7 +13,7 @@
 # under the License.
 
 import hashlib
-import mock
+from unittest import mock
 
 import monasca_api.db.fingerprint as fingerprint
 from monasca_api.tests import base

monasca_api/tests/policy/test_policy.py

@@ -14,8 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
 import requests_mock
+from unittest import mock
 
 from oslo_context import context
 from oslo_policy import policy as os_policy

monasca_api/tests/test_alarms_db_health_check.py

@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 
 from monasca_api import config
 from monasca_api.healthcheck import alarms_db_check as rdc

monasca_api/tests/test_healthchecks.py

@@ -13,7 +13,7 @@
 # under the License.
 
 import falcon
-import mock
+from unittest import mock
 
 from monasca_api import config
 from monasca_api.healthcheck import base

monasca_api/tests/test_kafka_health_check.py

@@ -12,7 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
+
 from six import PY3
 
 from monasca_common.kafka_lib import client

monasca_api/tests/test_keystone_protocol.py

@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 
 from monasca_api.healthcheck import keystone_protocol
 from monasca_api.tests import base

monasca_api/tests/test_log_publisher.py

@@ -16,8 +16,8 @@
 import copy
 import datetime
 import random
+from unittest import mock
 
-import mock
 from oslo_config import cfg
 from oslo_log import log
 import simplejson as json

monasca_api/tests/test_logs.py

@@ -13,8 +13,8 @@
 # under the License.
 
 import falcon
-import mock
 import simplejson as json
+from unittest import mock
 
 from monasca_api.tests import base
 from monasca_api.v2.reference import logs

monasca_api/tests/test_message_formats.py

@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 import json
-import mock
+from unittest import mock
 
 from monasca_api.common.messaging.message_formats.metrics import transform
 from monasca_api.tests import base

monasca_api/tests/test_metrics_db_health_check.py

@@ -13,7 +13,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 
 from monasca_common.simport import simport
 

monasca_api/tests/test_rest.py

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

monasca_api/tests/test_validation.py

@@ -15,7 +15,7 @@
 # under the License.
 
 import falcon
-import mock
+from unittest import mock
 
 from monasca_api.tests import base
 import monasca_api.v2.common.exceptions as common_exceptions

test-requirements.txt

@@ -11,7 +11,6 @@ cassandra-driver!=3.6.0,>=3.3.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 httplib2>=0.9.1 # MIT
 influxdb>=2.9.2 # MIT
-mock>=2.0.0 # BSD
 oslotest>=3.2.0 # Apache-2.0
 requests-mock>=1.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0