Updated openstack/openstack
Project: openstack/keystone  d229892bbd3ae6f985af0d7c761d8d75880a222e

New section for CLI examples in docs

In an effort to make 'configuration.rst' less bloated, move
common cli examples to their own section. Changed the titling
so they are no longer subtitles of another section.

Change-Id: I2785cbe8563e5adcae65aebf88152a5e055c28a9