Bug 214204 Only document content in document folder should be removed.[0601]
Description: Only document related content in document folder should be removed. Build number:2.3.0.v20080103 Steps to reproduce: 1. Deploy BIRT. 2. Edit web.xml to set BIRT_VIEWER_DOCUMENT_FOLDER to your local path and there are content inside the path. 3. Start server and click View Example to preview sample report. Expected result: Only content created by viewer should be removed in specified document folder. Actual result: All contents are deleted despite whether they are related with BIRT. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* @return
	 */
	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( "/" ) )