Use the correct console name in ddb-admin
Created by: davecromberge
When making changes to the cluster with the ddb-admin script, the nodetool attempts rpc calls to a non-existent process.
This PR addresses this by replacing with the correct process name (dalmatiner_console), which serves as a process interface to the admin commands originating from ddb-admin.
@Licenser please take a look, thanks.