8076387: Better CORBA value handling

Reviewed-by: rriggs, coffeys, skoivu, ahgross

src/share/classes/com/sun/corba/se/impl/io/IIOPInputStream.java

@@ -1068,6 +1068,9 @@ public class IIOPInputStream
 
             int spBase = spClass;       // current top of stack
 
+            if (currentClass.getName().equals("java.lang.String")) {
+                return this.readUTF();
+            }
             /* The object's classes should be processed from supertype to subtype
              * Push all the clases of the current object onto a stack.
              * Note that only the serializable classes are represented

src/share/classes/com/sun/corba/se/impl/io/IIOPOutputStream.java

@@ -559,6 +559,10 @@ public class IIOPOutputStream
              * Push all the clases of the current object onto a stack.
              * Remember the stack pointer where this set of classes is being pushed.
              */
+            if (currentClassDesc.forClass().getName().equals("java.lang.String")) {
+                    this.writeUTF((String)obj);
+                    return;
+            }
             int stackMark = classDescStack.size();
             try {
                 ObjectStreamClass next;