Bug 197228 Need updaet createdBy info when serialize the module
When open module, designer will pass the property map which contains the createdBy info. this info should be retained by moduleHandle and then be updated and written when doing serialization. Note if this info is null, model should not update it during serialization. This could happen for api users or third-party designer. For BIRT designer, it will guarantee this value always not null.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
*/
	private ElementRefValue theme = null;
	/**
	 * The fatal exception found in the included modules, which will stop
	 * opening the outer-most module.
	 */
	protected Exception fatalException;
	/**
	 * The registered API backward compatibility manager of this module.
	 */
	protected VersionControlMgr versionMgr = null;
	/**
	 * Options set for this module.
	 */
	protected ModuleOption options = null;
	/**
	 * Information member for line numbers.
	 */
	protected LineNumberInfo lineNoInfo = null;
	/**
	 * 
	 */
	protected INameHelper nameHelper = null;
	/**
	 * Default constructor.
	 * 
	 * @param theSession
	 *            the session of the report
	 */
	protected Module( DesignSession theSession )