Consolidate keystone token_flush setup into one command.

Obsolete need for editor knowledge by allowing for easy copy and
paste of one command that can be used to set this up.

Change-Id: I21b31ebd52a88949aaac758d5f7f17b7ff8839ba
Remove unused file addmethod.openstackapi

This file is just a very ugly copy from cinder without proper DocBook
markup and not used anywhere.
Remove it.

Change-Id: I0d719b4ac90b69989a38fdd85c3f006e0669a3d7
Merge "Remove unused file addmethod.openstackapi"
Merge "Consolidate keystone token_flush setup into one command."