Modified recipes to use cluster config
Updated configure_server.rb to bootstrap initial node
Update included to create SST user if specified
Cluster my.cnf template updated to allow for empty wsrep_sst_auth value
Revised template my.cnf.cluster.erb to clarify syntax
Moved sst_password from server attribute to cluster attribute
Updated added to cluster my.cnf to compensate for empty cluster name
Reset server role back to standalone default in attributes