search by definedBoundary doen't use boundary's parents
In v2, when we search for a bounday, it's parent are taken in account, it's not the case in v4.
For example, I have a hierarchy like this:
+-Suisse [Pays] +-Vaud [Canton] +-Bex [Commune] +-Aigle [Commune]
If I search for metadatas in "Bex", the results should contain metadatas with Boundaries of "Bex", "Vaud" and "Suisse".
I v2 it works like this for "Search By ID", I don't know it's the same for the "Search by BBox" (or if it should in v4)