8004341: Two JCK tests fails with 7u11 b06

Reviewed-by: serb, skoivu

src/share/classes/java/awt/Dialog.java

@@ -1638,12 +1638,13 @@ public class Dialog extends Window {
         if (localModalityType == null) {
             this.modal = fields.get("modal", false);
             setModal(modal);
+        } else {
+            this.modalityType = localModalityType;
         }
 
         this.resizable = fields.get("resizable", true);
         this.undecorated = fields.get("undecorated", false);
         this.title = (String)fields.get("title", "");
-        this.modalityType = localModalityType;
 
         blockedWindows = new IdentityArrayList<>();