OZG-7609 provide aggregation manager config endpoint without auhtantication

This reverts commit 87bcc47d.

src/main/java/de/ozgcloud/admin/reporting/ReportingAggregationManagerSettingDtoService.java

@@ -51,6 +51,6 @@ class ReportingAggregationManagerSettingDtoService implements SettingDtoService
 
 	@Override
 	public String getSettingKeyName() {
-		return "ozgcloud.aggregation";
+		return "aggregation";
 	}
 }