OZG-7837 reorder fields in AggregationMapping

src/main/java/de/ozgcloud/aggregation/transformation/AggregationMapping.java

@@ -39,11 +39,11 @@ import lombok.ToString;
 @ToString
 public class AggregationMapping {
 
+	@NotBlank
+	private String name;
 	@NotNull
 	@Valid
 	private FormIdentifier formIdentifier;
-	@NotBlank
-	private String name;
 
 	@Singular
 	@Valid