Layer metadata is not correctly migrating to MapBuilder site

[k-kresek]

Bug Description
In MapBuilder version 1.5, complete metadata as defined by the user is not appearing when the 'i' is selected. Only a couple lines load and they are not correctly formatted in tables.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://www.haynatiora.mg/map/'
2. Click on 'Statut des Terres' and then on 'Occupation fonciere'
3. Click 'i' button.
4. Only unformatted 'title' and 'subtitle' appear.

Expected behavior
A fully-formatted metadata table should appear here, with the complete information defined by the user. See any default GFW layer for an example of how it should appear.

Screenshots

[vaidotasp]

@k-kresek can you confirm that metadata is actually set on the layers? If I look at one of the layer examples, metadata seems to be empty :
https://www.haynatiora.mg/server/rest/services/fr/statut_des_terres_fr/MapServer/0
https://www.haynatiora.mg/server/rest/services/fr/statut_des_terres_fr/MapServer/0/metadata