Show reviewers name instead of User#toString in Excel export

view/src/main/java/se/su/dsv/scipro/datatables/project/ProjectDataPanel.java

@@ -167,6 +167,11 @@ public class ProjectDataPanel extends Panel {
             ) {
                 cellItem.add(new ReviewerColumnCell(componentId, rowModel));
             }
+
+            @Override
+            public IModel<?> getDataModel(IModel<Project> rowModel) {
+                return rowModel.map(Project::getReviewer).map(User::getFullName);
+            }
         };
     }