[Rdo-list] RDO and MariaDB+Galera wiki page

I've created a wiki page that shows how to use MariaDB+Galera with RDO Havana. You can find it here: http://openstack.redhat.com/MariaDB_Galera Comments, questions, suggestions welcome as always. I'd like to add more information about SST methods, including Percona's xtrabackup, in the near future. Ryan