WIP
Updated ComunidadesForm to new style

* Use *metadata* as the preferred word to the files with the rules
and domains. It's being used as folder, method, ... names
* Use ui, as preferred word for abeille files
* Add integration test between ComunidadesForm java code, bbdd, and ui
* Use BasicAbstractForm as parent class of the forms instead AbstractForm
Add PuntosViviendasForm
Update doc