Bug 199712 Output servlet doesn't support __svg[0601]
Description: Output servlet doesn't support __svg Build number:2.2.1.v200708130947 Steps to reproduce: 1. Preview a svg chart in browser using frameset/run/preview/output servlets. 2. Add __svg=true in url and check rendered chart image. 3. Change to __svg=false in url and check rendered chart image. Expected result: When svg=true, the chart image is a svg image in html source. When svg=false, the chart image isn't a svg image. Actual result: For output servlet, svg is true or false will always display chart image with non-svg type. It's ok for Frameset/run/preview servlets.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/actionhandler/BirtRenderReportActionHandler.java
{
	/**
	 * Output stream to store the report.
	 */
	private OutputStream os = null;
	/**
	 * Constructor.
	 * 
	 * @param context
	 * @param operation
	 */
	public BirtRenderReportActionHandler( IContext context,
			Operation operation, GetUpdatedObjectsResponse response,
			OutputStream os )
	{
		super( context, operation, response );
		assert os != null;
		this.os = os;
	}
	/**