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/context/ViewerAttributeBean.java
* @param request
	 *            HttpServletRequest
	 * @return
	 */
	protected void parseConfigVars( HttpServletRequest request )
	{
		assert reportDesignHandle != null;
		
		String reportConfigName = this.reportDesignName.replaceFirst(
				IBirtConstants.SUFFIX_DESIGN_FILE,
				IBirtConstants.SUFFIX_DESIGN_CONFIG );
		
		SessionHandle sessionHandle = DesignEngine.newSession( ULocale.US );
		ReportDesignHandle handle = null;
		try
		{
			this.configMap = new HashMap( );
			
			handle = sessionHandle.openDesign( reportConfigName );
			
			if ( handle != null )
			{
				Iterator configVars = handle.configVariablesIterator( );
				while ( configVars != null && configVars.hasNext( ) )
				{
					ConfigVariableHandle configVar = (ConfigVariableHandle) configVars
							.next( );
					if ( configVar != null && configVar.getName( ) != null )
					{