Bug 147995 Master page lost when drill through to a report document
Description: Master page lost when drill through to a report document Steps to reproduce: 1. New a report rpt1 with master page 2. Generate the report document for rpt1 3. New another report rpt2, drill through to the report document 4. Preview rpt2, link to the report document, master page is missing
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
{
	private static ReportEngineService instance;
	/**
	 * Report engine instance.
	 */
	private IReportEngine engine = null;
	/**
	 * Static engine config instance.
	 */
	private EngineConfig config = null;
	/**
	 * Image directory for report images and charts.
	 */
	private String imageDirectory = null;
	/**
	 * URL accesses images.
	 */
	private String imageBaseUrl = null;
	/**
	 * Image handler instance.
	 */
	private HTMLServerImageHandler imageHandler = null;
	/**
	 * Web app context path.
	 */