Remove six

Replace the following items with Python 3 style code.
- six.moves.BaseHttpServer
- six.moves.zip
- six.PY2
- six.viewitems

Change-Id: If68cc2778bfccc56248ab8fba3de764044a707e9

requirements.txt

@@ -17,7 +17,6 @@ python-novaclient>=10.1.0 # Apache-2.0
 python-mistralclient>=3.3.0 # Apache-2.0
 python-glanceclient>=2.8.0 # Apache-2.0
 python-vitrageclient>=2.0.0 # Apache-2.0
-six>=1.10.0 # MIT
 oslo.config>=5.2.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0

vitrage_tempest_plugin/tests/api/event/test_events.py

@@ -12,7 +12,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import six
 
 from datetime import datetime
 from oslo_log import log as logging
@@ -57,7 +56,7 @@ class TestEvents(BaseTestEvents):
                             'Expected host down alarm')
 
             alarm = api_alarms[0]
-            event_time_tz = six.u(event_time.strftime('%Y-%m-%dT%H:%M:%SZ'))
+            event_time_tz = str(event_time.strftime('%Y-%m-%dT%H:%M:%SZ'))
             self._check_alarm(alarm, event_time_tz, event_type, details)
 
             event_time = datetime.now()

vitrage_tempest_plugin/tests/base.py

@@ -18,8 +18,6 @@ from itertools import islice
 
 import networkx as nx
 from networkx.readwrite import json_graph
-import six
-from six.moves import zip
 
 from oslo_log import log as logging
 from oslo_utils import timeutils
@@ -56,10 +54,6 @@ LOG = logging.getLogger(__name__)
 IsEmpty = lambda: HasLength(0)
 IsNotEmpty = lambda: Not(IsEmpty())
 
-if six.PY2:
-    class ResourceWarning(Warning):
-        pass
-
 
 class BaseVitrageTempest(test.BaseTestCase):
     """Base test class for All Vitrage tests."""

vitrage_tempest_plugin/tests/common/general_utils.py

@@ -12,7 +12,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 from os import path
-import six
 
 
 def first_match(list_of_dicts, **kwargs):
@@ -33,7 +32,7 @@ def is_subset(subset, full):
     full_dict = full
     if type(full) is not dict:
         full_dict = vars(full)
-    return six.viewitems(subset) <= six.viewitems(full_dict)
+    return subset.items() <= full_dict.items()
 
 
 def _remove_none_values(**kwargs):

vitrage_tempest_plugin/tests/e2e/test_e2e_webhook.py

@@ -13,9 +13,9 @@
 # under the License.
 import ast
 
+import http.server as BaseHTTPServer
 from oslo_log import log as logging
 import requests
-from six.moves import BaseHTTPServer
 import socket
 from testtools import matchers
 from threading import Thread