[graph provision] fixed serialisation of the usage counts as measures in the XML records

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/XmlSerializationUtils.java

@@ -175,7 +175,8 @@ public class XmlSerializationUtils {
 				.append("<")
 				.append(name)
 				.append(" ")
-				.append(attr(measure.getId(), kv.getValue()))
+				.append(attr("id", measure.getId()))
+				.append(attr("score", kv.getValue()))
 				.append(attr("datasource", kv.getKey()))
 				.append(" />");
 		}

dhp-workflows/dhp-graph-provision/src/test/resources/eu/dnetlib/dhp/oa/provision/publication.json

@@ -8,6 +8,26 @@
     }
   ],
   "measures": [
+    {
+      "id": "views",
+      "unit": [
+        {
+          "key": "opendoar____::358aee4cc897452c00244351e4d91f69||ZENODO",
+          "value": "5",
+          "dataInfo": null
+        }
+      ]
+    },
+    {
+      "id": "downloads",
+      "unit": [
+        {
+          "key": "opendoar____::358aee4cc897452c00244351e4d91f69||ZENODO",
+          "value": "2",
+          "dataInfo": null
+        }
+      ]
+    },
     {
       "id": "influence",
       "unit": [