refactor(rmi-impl): simplify FieldDescriptor constructor using delegation

- Replace duplicate initialization code in 3-parameter constructor with delegation to 5-parameter constructor
- Pass null for Field parameter to maintain same behavior
- Substantive lines added: 1, lines removed: 6

Author: ngmr

yoko-rmi-impl/src/main/java/org/apache/yoko/rmi/impl/FieldDescriptor.java

@@ -109,12 +109,7 @@ enum ValueMemberAccess {
 
 
     FieldDescriptor(Class<?> owner, Class<?> type, String name, TypeRepository repo) {
-        super(repo, name);
-        this.type = type;
-        this.declaringClass = owner;
-        this.valueMemberAccess = ValueMemberAccess.PRIVATE;
-        getter = null;
-        setter = null;
+        this(owner, type, name, null, repo);
     }
 
     FieldDescriptor(Class<?> owner, Class<?> type, String name, Field f, TypeRepository repo) {