Consolidate keystone token_flush setup into one command.
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

gongysh2004/openstack-manual,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals,gongysh2004/openstack-manual,potsmaster/openstack-manuals,Akasurde/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,kairoaraujo/openstack-manuals,saeki-masaki/openstack-manuals,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,saeki-masaki/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals