2019-01-31 AC: bugfix

reactive/kubernetes-keystone.py

@@ -67,7 +67,7 @@ def setup_authentication():
         k8s_keystone_auth_start,
         'keystone_url':
         hookenv.config('keystone-url'),
-        'keystone_policy_file': 
+        'keystone_policy': 
         webhook_policy_file
     }
     render('webhook-authn.config', webhook_authn_config_path, webhook_context)