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
import org.eclipse.birt.report.model.util.ReferenceValueUtil;
import org.eclipse.birt.report.model.util.StructureRefUtil;
import org.eclipse.birt.report.model.util.VersionControlMgr;
import org.eclipse.birt.report.model.validators.ValidationExecutor;
import org.eclipse.birt.report.model.writer.ModuleWriter;
import com.ibm.icu.util.ULocale;
/**
 * Core representation of the module element. The module contains:
 * <ul>
 * <li>the name spaces for various kinds of elements
 * <li>a set of slots defined
 * <li>the library list
 * </ul>
 * by the derived class.
 * <p>
 * The Design Engine may be used in the web environment in which it is necessary
 * to identify elements using a unique ID separate from their object pointer.
 * The root class maintains the object ID counter, as well as an id-to-element
 * map. Because the map is costly, it is enabled only if ID support is enabled
 * in the data dictionary.
 */
public abstract class Module extends DesignElement
		implements
			IModuleModel,
			INameContainer
{
	/**
	 * Identifier for the shared style name space.
	 */
	public static final int STYLE_NAME_SPACE = 0;