Maid-315_update_data_manager_account_rebase

Based on the work from MAID-304.
1, trim DataManager account
2, update corresponding persona logical due to trimmed account in DM and PM
3, remove un-necessary class, action, etc.
4, comment out outdated tests
This has been covered in the commit of https://github.com/maqi/MaidSafe-Vault/commit/681688bf257ed9988956dc45dc1c45bcad5b04b0

close_node_changes shall guarantee there is only one lost_node reported each time.