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
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.namespace.INameContainer#makeUniqueName(org.eclipse.birt.report.model.core.DesignElement)
	 */
	public void makeUniqueName( DesignElement element )
	{
		nameHelper.makeUniqueName( element );
	}
	/**
	 * Returns the version manager for the API compatibility.
	 * 
	 * @return the version manager
	 */
	public VersionControlMgr getVersionManager( )
	{
		return versionMgr;
	}
	/**
	 * Gets the options set in the module or any one of its host.
	 * 
	 * @return the options
	 */
	abstract public ModuleOption getOptions( );
	/**
	 * Sets the options in this module.
	 * 
	 * @param options
	 *            the options to set
	 */