Updated openstack/openstack
Project: openstack/keystone  2553ab12c4a9d90b3a85bd49b0b802776ba0a32e

Fix a few typos in the shibboleth doc

Fixed the following:
- incorrect path /etc/shibboleth in an example
- authentication spelled incorrectly
- Shibboleth not capitalized once

Change-Id: Idfb55ef7da0d52ad2d468525363973f2722ed347