[dev-italia] Bad import in Emilia-Romagna

[Martin Raifer]

> It's possible to take the tags from the object id_1 and put them in the object id_2 then update id_2 and delete id_1. What do you think ??

Yes, that should work. When fixing this automatically, I'd probably
only do this for objects that have not been modified by other users
except for the original importer(s).

> Maybe I didn't understand you correctly. What I understood:
> - there are overlapping landuse polygons, deriving from an import in ER
> - those polygons have contradicting (different) landuse values

Yes, the (bigger) issue is probably one that cannot be fixed
automatically: where the landuse values of two identical overlapping
areas contradict themselves (like the wood+sports_centre example in my
original post). Maybe the source data already had the error, or the
importer mixed up some input layers and ended up importing one layer
twice, once with tags for a different layer.