OZG-7609 add ozgcloud prefix to aggregation properties and ITCase

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

@@ -52,6 +52,6 @@ class ReportingAggregationManagerSettingDtoService implements SettingDtoService
 
 	@Override
 	public String getSettingKeyName() {
-		return "aggregation";
+		return "ozgcloud.aggregation";
 	}
 }