*** Bug 1335981 has been marked as a duplicate of this bug. ***
Keystoneclient CLI is deprecated and removed in Newton, so there isn't upstream where this could be fixed. Best would be to migrate scripts to use openstackclient CLI and if there are still Unicode issue in openstackclient, they could be upstream.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-2031.html