Add optional geometrical attributes to ThermalZone, UsageZone, ThermalBoundary
Created by: RomainNouvel
Introduction of optional geometrical attributes to:
- ThermalZone: volumeGeometry, type: gml:Solid, [0..1]
- UsageZone: volumeGeometry, type: gml:Solid, [0..1]
- ThermalBoundary: surfaceGeometry, type: gml:Multi-Surface, [0..1]
Agreed in Workshop Munich by Thomas, Georgio, Alexandru, Silvia, Jerome, KH