Refactor missing metadata

api/src/engine/connectors/exareme/transformations.ts

@@ -21,7 +21,7 @@ export const transientToTable = jsonata(`
         $.single.*@$p#$i.{
             'groupBy' : 'single',
             'name': $keys(%)[$i],
-            'metadatas': $append("", $keys(*)).{
+            'headers': $append("", $keys(*)).{
                 'name': $,
                 'type': 'string'
             },

api/src/engine/models/experiment/experiment.model.ts

@@ -11,7 +11,7 @@ export const ResultUnion = createUnionType({
   name: 'ResultUnion',
   types: () => [TableResult, DummyResult],
   resolveType(value) {
-    if (value.metadatas) {
+    if (value.headers) {
       return TableResult;
     }
     if (value.listMax) {