WebDav harvester doesn't keep in synch uuid in database and xml metadata content after reharvest

[josegar74]

WebDav harvester creates a new UUID for the new metadata harvested.

This uuid is used in metadata table (uuid column) and also for the uuid field in xml content before inserting in the catalog. So both values are in synch.

But on reharvest, update the metadata just reads the xml content and updates it in the catalog.

This causes that metadata uuid becomes different in metadata table (uuid column) and xml content.

[josegar74]

Committed in master: 9ca438939eb3fcf334adff9b0432c408c448b1ae Committed in 2.8.x: 800f314f9d1a6b331871ccd2e3726a7cc736daae