Minor fixes after datamodel changes

src/test/java/it/inaf/oats/vospace/CreateNodeControllerTest.java

@@ -94,7 +94,7 @@ public class CreateNodeControllerTest {
         verify(controller).createNode(
                 argThat(node -> {
                     UnstructuredDataNode udn = (UnstructuredDataNode) node;
-                    Property property = udn.getProperties().getProperty().get(0);
+                    Property property = udn.getProperties().get(0);
                     return "vos:UnstructuredDataNode".equals(udn.getType())
                             && "test value".equals(property.getValue())
                             && "ivo://ivoa.net/vospace/core#description".equals(property.getUri());

src/test/resources/create-unstructured-data-node.json

 {
-    "properties": {
-        "property": [
+    "properties": [
         {
             "value": "test value",
             "uri": "ivo://ivoa.net/vospace/core#description",
             "readOnly": false
         }
-        ]
-    },
+    ],
     "type": "vos:UnstructuredDataNode",
     "uri": "vos://example.com!vospace/mydata1",
-    "accepts": {
-        "view": []
-    },
-    "provides": {
-        "view": []
-    },
-    "capabilities": {
-        "capability": []
-    },
+    "accepts": [],
+    "provides": [],
+    "capabilities": [],
     "busy": false
 }
\ No newline at end of file