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
"The input stream must not be null" ); 
		ReportDesign design = DesignReader.getInstance( ).read( this, systemId,
				is, options );
		designs.add( design );
		return design;
	}
	/**
	 * Open a module regardless of the module type(library or report design).
	 * 
	 * @param fileName
	 *            file name of the module This url is treated as an absolute
	 *            directory.
	 * @param is
	 *            the input stream to read the module
	 * @return the opened module
	 * @throws DesignFileException
	 *             If the file is not found, or the file contains fatal errors.
	 */
	public Module openModule( String fileName, InputStream is )
			throws DesignFileException
	{
		ModuleOption options = null;
		return openModule( fileName, is, options );
	}
	/**
	 * Open a module regardless of the module type(library or report design).
	 * 
	 * @param fileName
	 *            file name of the module This url is treated as an absolute
	 *            directory.