Upgrade from GeoNode 4.3 to 4.4

GNIP 100: Assets introduced Assets, which bring important changes to the internal management of resource files.

The most relevant change that affects the management of GeoNode is the location where the uploaded files are stored. They are still inside the STATIC_ROOT folder but have been moved from the previous uploaded sub-folder to the new one assets.

Keeping the pre-existing files in their original location is not problematic for GeoNode and Geoserver operations. However, the Backup and Restore routines will not manage them after the upgrade to GeoNode 4.4, because B/R will only look for managed assets under the new folder.

For this reason it's advice to migrate the old files to the new location. This can be achieved by running the command django-admin migrate_file_to_assets.py. This command will take care of moving the files and updating the GeoServer stores to point to the new locations.