Keystone middleware doesn't like if token is unicode. It must be conv…

…erted

to string before validation.

Change-Id: I537f3ca96229fd9abef18d8ceb56f3fee6fd1296
Fixes-Bug: #1604773

src/config/api-server/vnc_cfg_api_server.py

@@ -1748,7 +1748,7 @@ def obj_perms_http_get(self):
         if 'token' not in get_request().query:
             raise cfgm_common.exceptions.HttpError(
                 400, 'User token needed for validation')
-        user_token = get_request().query.token
+        user_token = get_request().query.token.encode("ascii")
 
         # get permissions in internal context
         try: