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
{
		this.allExceptions = allExceptions;
	}
	/**
	 * Returns the <code>URL</code> object if the file with
	 * <code>fileName</code> exists. This method takes the following search
	 * steps:
	 * <ul>
	 * <li>Search file taking <code>fileName</code> as absolute file name;
	 * <li>Search file taking <code>fileName</code> as relative file name and
	 * basing "base" property of module;
	 * <li>Search file with the file locator (<code>IResourceLocator</code>)
	 * in session.
	 * </ul>
	 * 
	 * @param fileName
	 *            file name to search
	 * @param fileType
	 *            file type. The value should be one of:
	 *            <ul>
	 *            <li><code>IResourceLocator.IMAGE</code>
	 *            <li><code>IResourceLocator.LIBRARY</code>
	 *            <li><code>IResourceLocator.MESSAGEFILE</code>
	 *            </ul>
	 *            Any invalid value will be treated as
	 *            <code>IResourceLocator.IMAGE</code>.
	 * @return the <code>URL</code> object if the file with
	 *         <code>fileName</code> is found, or null otherwise.
	 */
	public URL findResource( String fileName, int fileType )