Create a OSMBuildingInitializer Class that deals with OSM buildings specifically

OSM buildings are a special case compared to any other building database, as they can be found in the OSM Replication database, where not only the building information, but also the information about the building context is found. Therefore some optimization in queries can be made for the OSM buildings that are not possible for other building datasets.

The reason why I would implement this one first, as opposed to a generalized one, is that the implementation already exists, so only a few lines of code need to be copied, instead of removed and made new