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.tests/test/org/eclipse/birt/report/model/parser/ReportDesignParseTest.java
* <tr>
 * <td width="33%" height="16"><b>Method </b></td>
 * <td width="33%" height="16"><b>Test Case </b></td>
 * <td width="34%" height="16"><b>Expected Result </b></td>
 * </tr>
 * 
 * <tr>
 * <td width="33%" height="16">{@link #testParser()}</td>
 * <td width="33%" height="16">Test all propertyies</td>
 * <td width="34%" height="16">the correct value are returned</td>
 * </tr>
 * 
 * <tr>
 * <td width="33%" height="14"></td>
 * <td width="33%" height="14">Use iterator to test the reportItems slot in
 * freeform</td>
 * <td width="34%" height="14">content can be retrieved.</td>
 * </tr>
 * 
 * <tr>
 * <td width="33%" height="16"></td>
 * <td width="33%" height="16">Test the freeform extends relationship</td>
 * <td width="34%" height="16">extend relationship correct.</td>
 * </tr>
 * 
 * <tr>
 * <td width="33%" height="16">{@link #testWriter()}</td>
 * <td width="33%" height="16">Set new value to properties and save it.</td>
 * <td width="34%" height="16">new value should be save into the output file.
 * </td>