Bug 152828 Add the projectFolder property on module
When user doesn't set the resource folder path in designer, there should be a default working path for Birt to manage the report design and find the related resources. A new property should be added on Module: name: projectFolder type:URL This property only can be given from the open design method from session but should not be set after the module initialized. Concern about the backward compatiblity issue, a new method will be added. Open design with a config argument.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignSession.java
*             If the file is not found, or the file contains fatal errors.
	 */
	public Module openModule( String fileName ) throws DesignFileException
	{
		ModuleOption options = null;
		return openModule( fileName, options );
	}
	/**
	 * Open a module regardless of the module type(library or report design).
	 * 
	 * @param fileName
	 *            file name of the module
	 * @param options
	 *            the options set for this module
	 * @return the opened module
	 * @throws DesignFileException
	 *             If the file is not found, or the file contains fatal errors.
	 */
	public Module openModule( String fileName, ModuleOption options )
			throws DesignFileException
	{
		if ( fileName == null )
			throw new IllegalArgumentException(
					"The file name must not be null" ); 
		Module module = GenericModuleReader.getInstance( ).read( this,
				fileName, options );
		assert module instanceof Library || module instanceof ReportDesign;
		if ( module instanceof ReportDesign )
			designs.add( module );
		else