Updated openstack/openstack
Project: openstack/python-keystoneclient  29049f65654d4a7f057cab438bb9152900ee58db

Warn that keystone CLI is pending deprecation

The keystone CLI is pending deprecation so warn about it in the
developer docs.

DocImpact

Change-Id: Ibca9d4cd8d31a62ee1ec7f24671c8f0f01ca9f7f