Clean root password Management

Don't store the root password.
Provide easy replacement for mysql_pwd.py

posttemplate/25-bdd-cluster

@@ -2,6 +2,7 @@
 
 db=$(CreoleGet dbEnable non)
 cluster=$(CreoleGet dbEnableCluster non)
+role=$(CreoleGet dbClusterPosition 'Node')
 gstateFile="/var/lib/mysql/grastate.dat"
 
 if [[ ${db} == "oui" ]]
@@ -10,7 +11,7 @@ then
     then
         if [[  ! -e ${gstateFile} ]]
         then
-            galera_new_cluster
+			[[ ${role} == "Leader"  ]] && galera_new_cluster
         fi
     fi
 fi