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
* 
	 * <dt>Blank name, name is required</dt>
	 * <dd>Create a default name of the form "NewTable" where "New" is
	 * localized, and "Table" is the localized element name for creating a new
	 * element.</dd>
	 * 
	 * <dt>Name already exists in the name space</dt>
	 * <dd>This can occur either for the name provided, or for the default name
	 * created above. Add a number suffix to make the name unique. Example:
	 * "MyName4".</dd>
	 * </dl>
	 * 
	 * @param element
	 *            element for which to create a unique name
	 */
	
	
	
	
	/**
	 * Returns a unique name for an element.
	 * 
	 * @param element
	 *            the given element.
	 * @return unique name of given element.
	 */