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: I1dca4b2c7eccf1b19482dde60b88a132935b48b8
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

test-requirements.txt

@@ -3,7 +3,6 @@
 # process, which may cause wedges in the gate later.
 hacking>=3.0,<3.1.0 # Apache-2.0
 bandit!=1.6.0,>=1.1.0 # Apache-2.0
-mock>=2.0.0 # BSD
 coverage!=4.4,>=4.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 prometheus_client

tests/checks_d/test_ceph.py

@@ -11,9 +11,9 @@
 # under the License.
 
 import json
-import mock
 import os
 import subprocess
+from unittest import mock
 import unittest
 
 from monasca_agent.common import util

tests/checks_d/test_cert_file_check.py

@@ -14,10 +14,10 @@
 
 import datetime
 import logging
-import mock
 import os
 import shutil
 import tempfile
+from unittest import mock
 import unittest
 
 from cryptography import x509

tests/checks_d/test_host_alive.py

@@ -11,7 +11,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 import unittest
 
 import monasca_agent.common.util as util

tests/checks_d/test_ib_network.py

@@ -12,9 +12,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
 import unittest
 
-import mock
 
 import monasca_agent.collector.checks_d.ib_network as ib_network
 

tests/checks_d/test_kibana.py

@@ -14,8 +14,8 @@
 
 import os
 import logging
+from unittest import mock
 import unittest
-import mock
 import json
 import random
 

tests/checks_d/test_kubernetes_api.py

@@ -11,7 +11,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 import unittest
 
 from monasca_agent.collector.checks_d.kubernetes_api import KubernetesAPI

tests/checks_d/test_swift_handoffs.py

@@ -10,7 +10,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 import unittest
 from collections import defaultdict
 from tempfile import mkdtemp

tests/checks_d/test_swift_recon.py

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

tests/detection/test_ceph.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
 import psutil

tests/detection/test_host_alive.py

@@ -11,7 +11,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
+from unittest import mock
 import unittest
 
 from monasca_setup.detection.plugins.host_alive import HostAlive

tests/detection/test_ib_network.py

@@ -12,9 +12,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+from unittest import mock
 import unittest
 
-import mock
 
 import monasca_setup.detection.plugins.ib_network as ib_network
 

tests/detection/test_influxdb.py

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

tests/detection/test_influxdb_relay.py

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

tests/detection/test_kibana.py

@@ -14,8 +14,8 @@
 
 import logging
 import os
+from unittest import mock
 import unittest
-import mock
 import psutil
 import json
 import six

tests/detection/test_libvirt.py

@@ -13,7 +13,7 @@
 # under the License.
 
 from collections import namedtuple
-import mock
+from unittest import mock
 import unittest
 
 from oslo_config import cfg

tests/detection/test_mon.py

@@ -12,10 +12,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 import random
+from unittest import mock
 import unittest
 
 import logging
-import mock
 import psutil
 import six
 

tests/detection/test_utils.py

@@ -13,8 +13,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
 import os
+from unittest import mock
 
 from oslotest import base
 from oslo_config import cfg

tests/detection/test_zookeeper.py

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

tests/test_config.py

@@ -11,8 +11,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
 import os.path
+from unittest import mock
+
 import six
 import tempfile
 import unittest

tests/test_keystone.py

@@ -12,8 +12,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import mock
 import random
+from unittest import mock
 
 from oslotest import base
 

tests/test_modify_config.py

@@ -12,7 +12,7 @@
 # under the License.
 
 import collections
-import mock
+from unittest import mock
 import unittest
 
 import monasca_setup

tests/test_process.py

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