Upgrade python-keystoneclient

Upgrade python-keystoneclient

When running the os-odl_l2-bgpvpn-ha scenario I encountered the
following issue:

root@0a60c30641e7:~# . $creds
root@0a60c30641e7:~# neutron net-list
An auth plugin is required to fetch a token
root@0a60c30641e7:~# pip show python-keystoneclient
Name: python-keystoneclient
Version: 2.3.1
Summary: Client Library for OpenStack Identity
Home-page: http://www.openstack.org/
Author: OpenStack
Author-email: openstack-dev@lists.openstack.org
License: UNKNOWN
Location: /usr/local/lib/python2.7/dist-packages
Requires: PrettyTable, stevedore, requests, six, oslo.i18n, oslo.utils,
oslo.config, pbr, oslo.serialization, keystoneauth1, iso8601,
debtcollector, positional

Upgrading the python-keystoneclient package resolves it.

Change-Id: I5b2564cc7980ef42df90ec454ea5b6dbc121b3de
Signed-off-by: George Paraskevopoulos <geopar@intracom-telecom.com>