6849277: Nimbus L&F: lots of painter classes were added to JDK7 as public

Reviewed-by: malenkov

src/share/classes/javax/swing/plaf/nimbus/Defaults.template

@@ -278,7 +278,7 @@ ${UI_DEFAULT_INIT}
      * offset (if any), and whether it is to be bold, italic, or left in its
      * default form.</p>
      */
-    public static final class DerivedFont implements UIDefaults.ActiveValue {
+    static final class DerivedFont implements UIDefaults.ActiveValue {
         private float sizeOffset;
         private Boolean bold;
         private Boolean italic;

src/share/classes/javax/swing/plaf/nimbus/PainterImpl.template

@@ -31,7 +31,7 @@ import javax.swing.*;
 import javax.swing.Painter;
 
 
-public final class ${PAINTER_NAME} extends AbstractRegionPainter {
+final class ${PAINTER_NAME} extends AbstractRegionPainter {
     //package private integers representing the available states that
     //this painter will paint. These are used when creating a new instance
     //of ${PAINTER_NAME} to determine which region/state is being painted