[v8r6] RAWIntegrity improvements
Quite some changes. Next step is SQLAlchemy
- Use the bulk removal instead of sequential in the xmlrpc call of DataMover
- Remove useless methods. Don't call again checkArgumentFormat
- reformat RAWIntegrityAgent to perform direct delete
- Does not use anymore this non existing retransfer call
- Does not try to remove from Destination anymore
- Performs bulk removal and registrations
- Does not create requests anymore, but delete directly
- Uses intermediate states in case of errors (Copied, Migrated)
- Correct documentation