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: I0bb826280b27bd71a77faa8b6475f2643801205b
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

sahara_plugin_ambari/tests/unit/plugins/ambari/test_client.py

@@ -14,7 +14,8 @@
 # limitations under the License.
 
 
-import mock
+from unittest import mock
+
 from oslo_serialization import jsonutils
 
 from sahara.plugins import exceptions as p_exc

sahara_plugin_ambari/tests/unit/plugins/ambari/test_common.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
 
 from sahara_plugin_ambari.plugins.ambari import common
 from sahara_plugin_ambari.tests.unit import base

sahara_plugin_ambari/tests/unit/plugins/ambari/test_configs.py

@@ -15,8 +15,8 @@
 
 
 import collections
+from unittest import mock
 
-import mock
 import six
 
 from sahara_plugin_ambari.plugins.ambari import configs

sahara_plugin_ambari/tests/unit/plugins/ambari/test_deploy.py

@@ -14,7 +14,8 @@
 # limitations under the License.
 
 from functools import wraps
-import mock
+from unittest import mock
+
 from oslo_serialization import jsonutils
 
 

sahara_plugin_ambari/tests/unit/plugins/ambari/test_ha_helper.py

@@ -14,8 +14,8 @@
 # limitations under the License.
 
 import copy
+from unittest import mock
 
-import mock
 
 from sahara_plugin_ambari.plugins.ambari import ha_helper as ha
 from sahara_plugin_ambari.tests.unit import base

sahara_plugin_ambari/tests/unit/plugins/ambari/test_health.py

@@ -13,7 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
+
 import six
 import testtools
 

sahara_plugin_ambari/tests/unit/plugins/ambari/test_open_ports.py

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 
-import mock
+from unittest import mock
 
 from sahara_plugin_ambari.plugins.ambari import common as p_common
 from sahara_plugin_ambari.plugins.ambari import plugin

sahara_plugin_ambari/tests/unit/plugins/ambari/test_requests_helper.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
 
 from sahara_plugin_ambari.plugins.ambari import requests_helper
 from sahara_plugin_ambari.tests.unit import base

sahara_plugin_ambari/tests/unit/plugins/ambari/test_validation.py

@@ -14,7 +14,7 @@
 # limitations under the License.
 
 
-import mock
+from unittest import mock
 
 from sahara.plugins import exceptions
 from sahara_plugin_ambari.plugins.ambari import common as p_common

test-requirements.txt

@@ -9,7 +9,6 @@ bashate>=0.5.1 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
-mock>=2.0.0 # BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 pylint==1.4.5 # GPLv2