Add a "rename task" in DAG

[chpicone]

Original requirements are changed: we are not more sure that the name of the raster represents the BIBID. After the geoprcoessing task (and before the geonode upload task) we need to add a task with this purpose:

• read the tag identifier (it contains the BIBID code)
• check if the filename is equal to the BIBID code
• if NO, rename the file accordingly