Bug 207268 Add visibility option for plot within axes
For chart with axes, we should make plot within axes invisible. Meantime, other plots, such as axes, legend and title, should be visible. This enhancement doesn't include UI change, and it is required for cross tab integration.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/AxesRenderer.java
{
	private static ILogger logger = Logger.getLogger( "org.eclipse.birt.chart.engine/render" ); 
	private Axis ax;
	private boolean leftWallFill = false;
	private boolean rightWallFill = false;
	private boolean floorFill = false;
	/**
	 * The constructor.
	 */
	public AxesRenderer( )
	{
		super( );
	}
	/**
	 * Overridden behavior for graphic element series that are plotted along
	 * axes
	 * 
	 * @param bo
	 */
	public final void render( Map htRenderers, Bounds bo )
			throws ChartException
	{
		final boolean bFirstInSequence = ( iSeriesIndex == 0 );