Hierarchy v2 sample

Including
- CDS OData V2 Adapter Proxy
- OData V2
- Fiori Elements V2
- SAPUI5
- List Report (type `TreeTable`)
- `@sap.hierarchy` annotations

fiori/app/services.cds

@@ -5,5 +5,6 @@
 using from './admin-authors/fiori-service';
 using from './admin-books/fiori-service';
 using from './browse/fiori-service';
+using from './genres/fiori-service';
 using from './common';
 using from '@capire/bookstore/srv/mashup';