Bug 200812 Issue when remove one separator setting in viewer.property[0002]
Description: Issue when remove one separator setting in viewer.property Build number:2.2.1.v200708220927 Steps to reproduce: 1. Deploy birt. 2. Open viewer.properties under WEB-INF folder. 3. Delete "viewer.sep.0=," line 4. Start server. 5. Preview report. 6. Export Data, select columns and select "Comma(,)", click OK. Expected result: Comma(,) isn't in the separator list. Actual result: Nothing happened after step6 and no error logs. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
*/
	public static String getShowParameterPage( HttpServletRequest request )
	{
		return getParameter( request, PARAM_PARAMETER_PAGE );
	}
	/**
	 * Returns the application properties
	 * 
	 * @param context
	 * @param props
	 * @return
	 */
	public synchronized static Map initViewerProps( ServletContext context,
			Map props )
	{
		
		if ( props == null )
			props = new HashMap( );
		
		String file = context.getInitParameter( INIT_PARAM_CONFIG_FILE );
		if ( file == null || file.trim( ).length( ) <= 0 )
			file = IBirtConstants.DEFAULT_VIEWER_CONFIG_FILE;
		try
		{
			InputStream is = null;
			if ( isRelativePath( file ) )
			{
				
				if ( !file.startsWith( "/" ) ) 
					file = "/" + file;