fieldnames: return only field names of java objects instead of description. * java/org/octave/ClassHelper.java (getFields): the method java.lang.reflect.Field.toString() returns a string description of each field, e.g., 'public static final double java.lang.Double.MAX_VALUE', instead of just the name 'MAX_VALUE'. Fixed by using the correct method getName(). * general/fieldnames.m: adapt the tests to check for the name and extend for when passing a java object instead of just the class name.

--- a/scripts/java/org/octave/ClassHelper.java
+++ b/scripts/java/org/octave/ClassHelper.java
@@ -199,7 +199,7 @@
           {
             sb.append (";");
           }
-        sb.append (theField[i].toString ());
+        sb.append (theField[i].getName ());
       }
 
     return (sb.toString ());