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
* absolute path, return it directly. Else, return the absolute path based
	 * on working folder.
	 * 
	 * @param filePath
	 * @param request
	 * @return
	 */
	public static String getRealPathOnWorkingFolder( String filePath,
			HttpServletRequest request )
	{
		
		if ( !isRelativePath( filePath ) )
			return filePath;
		
		if ( isRelativePath( workingFolder ) )
		{
			filePath = getRealPath( workingFolder + "/" + filePath, request 
					.getSession( ).getServletContext( ) );
		}
		else
		{
			filePath = workingFolder + File.separator + filePath;
		}
		return filePath;
	}
	/**
	 * Create the file path of the the document. The document will be put under
	 * the document folder based on different session id.
	 * 
	 * @param filePath