Fix issues in User CRUD section
Fix issues in User CRUD section

The user CRUD section had several issues.

 - CRUD wasn't defined
 - public_api is a literal string from the config file
 - The pipelines are now defined in keystone-paste.ini
 - The default pipeline has changed, stats_monitoring and xml_body
   don't exist anymore
 - tokens are invalidated in every token persistence backend

These are corrected.

Change-Id: I0620e8543d76220e2263ace2145e2b4eb0529b30

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