Handle new format in name-suggestion-index

[nuxper]

name-suggestion-index output file "nsi.json" had a change in format.
For each tag path (for ex. brands/amenity/atm), the nsi.json now contains:

• a "properties" element containing a dictionary
• a "items" element containing the list of brands / operators.

I create this issue to track the update of TagFix_brand.py to follow this change of format.

The change is ready. I'll create a PR in a moment.

[UKChris-osm]

Is this in reference to Osmose backend? osm-fr/osmose-backend#1202

[nuxper]

Arg you are right. I created the issue on the wrong project!!!

[bhousel]

Yes sorry for the changes from #4906, as we get ready for a more formal release.
We are pretty close to releasing V5 for real, so I don't think the file format will change anymore..
(One good thing about having properties in a dedicated properties: {} object is that we can add stuff without changing the file format anymore).