Bug 143671 [Linux-As][Smoke]Parameter can't be used.
Details: [Linux-As]Parameter can't be used. Setp: 1.New a report design. 2.New a paremeter. 3.Preview and click Run Report Parameter. 4.Dialog pop up and press OK. Actual resutl: Report error.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* @param request
	 * @return
	 */
	public static boolean isDesigner( HttpServletRequest request )
	{
		boolean inDEsigner = false;
		if ( "true".equalsIgnoreCase( getParameter( request, PARAM_DESIGNER ) ) ) 
		{
			inDEsigner = true;
		}
		return inDEsigner;
	}
	/***************************************************************************
	 * For export data
	 **************************************************************************/
	/**
	 * Check whether the request is to get image.
	 * 
	 * @param request
	 *            http request
	 * @return is get image or not
	 */
	public static boolean isGetImageOperator( HttpServletRequest request )
	{
		String imageName = getParameter( request, PARAM_IMAGEID );
		return imageName != null && imageName.length( ) > 0;
	}
	/**
	 * Check whether the request is to get reportlet.
	 *