Add config sample reference to KeystoneAuth docs
Add config sample reference to KeystoneAuth docs

Change-Id: I38a7bd7b85de9d674386d75220b31cc467746da8

hurricanerix/swift,psachin/swift,thiagodasilva/swift,notmyname/swift,levythu/swift,hurricanerix/swift,psachin/swift,clayg/swift,rackerlabs/swift,prashanthpai/swift,williamthegrey/swift,prashanthpai/swift,tipabu/swift,redbo/swift,psachin/swift,tipabu/swift,openstack/swift,matthewoliver/swift,hurricanerix/swift,smerritt/swift,notmyname/swift,notmyname/swift,thiagodasilva/swift,openstack/swift,matthewoliver/swift,revoer/keystone-8.0.0,nadeemsyed/swift,notmyname/swift,revoer/keystone-8.0.0,swiftstack/swift,swiftstack/swift,tipabu/swift,rackerlabs/swift,tipabu/swift,psachin/swift,williamthegrey/swift,clayg/swift,larsbutler/swift,larsbutler/swift,levythu/swift,openstack/swift,aerwin3/swift,aerwin3/swift,nadeemsyed/swift,matthewoliver/swift,nadeemsyed/swift,redbo/swift,smerritt/swift,hurricanerix/swift,smerritt/swift,swiftstack/swift,clayg/swift,matthewoliver/swift,smerritt/swift,clayg/swift,openstack/swift,nadeemsyed/swift