Avoid concise format

Author: jason-fox

import-data

@@ -20,7 +20,7 @@ curl -X POST \
   -d '{
     "id": "urn:ngsi-ld:Building:store001",
     "type": "Building",
-    "category": { "vocab": ["commercial"]},
+    "category": {"type": "VocabProperty", "vocab": ["commercial"]},
     "address": {
       "type": "Property", 
       "value": {"streetAddress": "Bornholmer Straße 65","addressRegion": "Berlin","addressLocality": "Prenzlauer Berg","postalCode": "10439"},