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
*/
	public List getAllLibraries( )
	{
		return getLibraries( IAccessControl.ARBITARY_LEVEL );
	}
	/**
	 * Returns included libaries within the given depth.
	 * 
	 * @param level
	 *            the given depth
	 * @return list of libraries.
	 * 
	 * @see IModuleNameScope
	 */
	public List getLibraries( int level )
	{
		if ( level <= IAccessControl.NATIVE_LEVEL || libraries == null )
			return Collections.EMPTY_LIST;
		int newLevel = level - 1;
		
		if ( newLevel == IAccessControl.NATIVE_LEVEL )
			return Collections.unmodifiableList( libraries );
		List allLibraries = new ArrayList( libraries );
		Iterator iter = new ArrayList( allLibraries ).iterator( );
		while ( iter.hasNext( ) )
		{
			Library library = (Library) iter.next( );
			allLibraries.addAll( library.getLibraries( newLevel ) );
		}
		return allLibraries;