Adds documentation on creating Oslo RequestContext in Castellan
Adds documentation on creating Oslo RequestContext in Castellan

This patch adds documentation showing how oslo.context
Request Context can be generated using keystone client. This
documentation will be useful to new Castellan users who are
no familiar with using context.

Change-Id: I60999890cd033808713595087074085bfa915181

openstack/castellan,openstack/castellan