Remove usage of six

Because this plugin now supports pyton 3 only, usage of six is no
longer necessary.

Change-Id: I00cd2c6f9fd466c2a6fe486be6ad6929e893c9b0

requirements.txt

@@ -5,6 +5,5 @@
 pbr>=2.0 # Apache-2.0
 oslo.config>=6.0.0 # Apache-2.0
 oslo.utils>=3.37.0 # Apache-2.0
-six>=1.10.0 # MIT
 tempest>=17.1.0 # Apache-2.0
 gabbi>=1.30.0 # Apache-2.0

telemetry_tempest_plugin/aodh/service/client.py

@@ -15,7 +15,8 @@
 
 import json
 
-from six.moves.urllib import parse as urllib
+from urllib import parse
+
 from tempest import clients as tempest_clients
 from tempest import config
 from tempest.lib.common import rest_client
@@ -50,7 +51,7 @@ class AlarmingClient(rest_client.RestClient):
         if marker:
             uri_dict.update({'marker': marker})
         if uri_dict:
-            uri += "?%s" % urllib.urlencode(uri_dict, doseq=True)
+            uri += "?%s" % parse.urlencode(uri_dict, doseq=True)
         resp, body = self.get(uri)
         self.expected_success(200, resp.status)
         body = self.deserialize(body)