Bug 168304 Context root issue when set to other BIRT Web Project.[0603]
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/servlet/ViewerServlet.java
* 
	 * @param request
	 *            incoming http request
	 * @param response
	 *            http response
	 * @return
	 */
	protected boolean __authenticate( HttpServletRequest request,
			HttpServletResponse response )
	{
		return true;
	}
	/**
	 * Process exception for non soap request.
	 * 
	 * @param context
	 * @param exception
	 * @throws ServletException
	 * @throws IOException
	 */
	protected void __handleNonSoapException( IContext context,
			Exception exception ) throws ServletException, IOException
	{
		String target = "webcontent/birt/pages/common/Error.jsp"; 
		context.getRequest( ).setAttribute( "error", exception ); 
		RequestDispatcher rd = context.getRequest( ).getRequestDispatcher(
				target );
		rd.include( context.getRequest( ), context.getResponse( ) );
	}
}