commands from groups should be stored in device since registration is only possible against device entity.
Otherwise commands is stored in entity as normal string type attribute.
Moreover any command group modification requires device registration would be done again, and then implies device and entity should be deleted previously.
Bug introduced in 3.3.0 by https://github.com/telefonicaid/iotagent-node-lib/pull/1396
commands from groups should be stored in device since registration is only possible against device entity.
Otherwise commands is stored in entity as normal string type attribute.
Moreover any command group modification requires device registration would be done again, and then implies device and entity should be deleted previously.