changed title structure from field to object for multiple language handling

dnet-ariadneplus/src/main/resources/es/schemaAriadneplusElasticsearch.curl

@@ -1,4 +1,4 @@
-curl -X PUT "http://elastic-test.ariadne.d4science.org:9200/ariadneplus?pretty" -H 'Content-Type: application/json'     -d '
+curl -X PUT "http://elastic-test.ariadne.d4science.org:9200/ariadneplus_test?pretty" -H 'Content-Type: application/json'     -d '
 {
    "mappings": {
       "dynamic": false,
@@ -307,7 +307,14 @@ curl -X PUT "http://elastic-test.ariadne.d4science.org:9200/ariadneplus?pretty"
             }
          },
          "title": {
-            "type": "text"
+            "properties": {
+               "text": {
+                  "type": "text"
+               },
+               "language": {
+                  "type": "text"
+               }
+            }
          },
          "wasCreated": {
             "type": "date",