Use positional instead of keystoneclient version

Use the standalone positional library rather than the utils package from
keystoneclient.

Change-Id: Iaa83e09bb45c766b35755621586700f7cde358b9

keystonemiddleware/fixture.py

@@ -15,8 +15,8 @@ import uuid
 
 import fixtures
 from keystoneauth1 import fixture as client_fixtures
-from keystoneclient import utils
 from oslo_utils import timeutils
+from positional import positional
 
 from keystonemiddleware import auth_token
 from keystonemiddleware.auth_token import _exceptions
@@ -43,7 +43,7 @@ class AuthTokenFixture(fixtures.Fixture):
     def tokens(self):
         return self._token_data.keys()
 
-    @utils.positional(1)
+    @positional(1)
     def add_token_data(self, token_id=None, expires=None,
                        user_id=None, user_name=None,
                        user_domain_id=None, user_domain_name=None,

requirements.txt

@@ -9,6 +9,7 @@ oslo.i18n>=2.1.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.utils>=3.4.0 # Apache-2.0
 pbr>=1.6 # Apache-2.0
+positional>=1.0.1 # Apache-2.0
 pycadf!=2.0.0,>=1.1.0 # Apache-2.0
 python-keystoneclient!=1.8.0,!=2.1.0,>=1.6.0 # Apache-2.0
 requests!=2.9.0,>=2.8.1 # Apache-2.0