Deploy on BTP (#793)

minimal changes required to deploy the CAP samples in _shared db_ mode:
- db: all bookshop, orders, reviews CDS models into one db instance (_shared-db_)
- services: bookstore, orders, reviews
- approuter with UI symlinks:
  - Vue: bookshop, reviews
  - Fiori: orders
 - authentification: xsuaa
 - messaging: Event Mesh
 - destinations: orders, reviews
- cds:
  - projection OrdersNoDraft for backend direct access
  - event OrderChanged
- deployment: mta.yml

reviews/package.json

@@ -7,17 +7,18 @@
     "index.cds"
   ],
   "dependencies": {
+    "@cap-js/hana": "^1",
     "@sap/cds": ">=5",
+    "@sap/xssec": "^4.2.7",
     "express": "^4.17.1"
   },
   "cds": {
     "requires": {
-      "messaging": {
-        "[development]": { "kind": "file-based-messaging" },
-        "[hybrid]": { "kind": "enterprise-messaging-shared" },
-        "[production]": { "kind": "enterprise-messaging" }
-      },
-      "db": { "kind": "sql" }
+      "messaging": true,
+      "db": true
     }
+  },
+  "scripts": {
+    "start": "cds-serve"
   }
-}
+}