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: I7bf6d007ca8c01b53152301d862f3aacf11480b2
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

masakaridashboard/hosts/tests.py

@@ -13,12 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from unittest import mock
+
 from django.urls import reverse
-import mock
 
 from masakaridashboard.test import helpers as test
 
-
 INDEX_URL = reverse('horizon:masakaridashboard:hosts:index')
 
 

masakaridashboard/notifications/tests.py

@@ -12,16 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from unittest import mock
+
 from django.conf import settings
 from django.test.utils import override_settings
 from django.urls import reverse
 from django.utils.http import urlunquote
-import mock
 
 from masakaridashboard.notifications import tables as notification_tab
 from masakaridashboard.test import helpers as test
 
-
 INDEX_URL = reverse('horizon:masakaridashboard:notifications:index')
 
 

masakaridashboard/segments/tests.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
+from unittest import mock
 
 from django.conf import settings
 from django.test.utils import override_settings

test-requirements.txt

@@ -11,7 +11,6 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 
 # Testing Requirements
 coverage!=4.4,>=4.0 # Apache-2.0
-mock>=2.0.0 # BSD
 mox3>=0.20.0  # Apache-2.0
 nodeenv>=0.9.4 # BSD
 selenium>=2.50.1 # Apache-2.0