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
/**
	 * Builds up the namespace and id-map for the cloned module.
	 * 
	 * @param module
	 *            the cloned module to build
	 * @param element
	 *            the element in the module to add into the namespace and id-map
	 */
	private void buildNameSpaceAndIDMap( Module module, DesignElement element )
	{
		if ( module == null || element == null )
			return;
		assert !( element instanceof Module );
		if ( element instanceof TemplateElement )
		{
			TemplateParameterDefinition templateParam = element
					.getTemplateParameterElement( module );
			if ( templateParam != null && templateParam.getRoot( ) != module )
			{
				element
						.setProperty(
								IDesignElementModel.REF_TEMPLATE_PARAMETER_PROP,
								new ElementRefValue( null, templateParam
										.getFullName( ) ) );
			}
		}
		ElementDefn defn = (ElementDefn) element.getDefn( );
		assert module.getElementByID( element.getID( ) ) == null;
		assert element.getID( ) > NO_ID;
		module.addElementID( element );