Bug 183733 Implement the IScriptOjectClassInfo to provide the class infromation to support the JS code assistant.
Engine should implement the IScriptObjectClassInfo interface to return the class information for script object.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ExecutionContext.java
/**
	 * All page break listeners.
	 */
	private List pageBreakListeners;
	
	/**
	 * create a new context. Call close to finish using the execution context
	 */
	public ExecutionContext( )
	{
		this( null );
	}
	/**
	 * create a new context. Call close to finish using the execution context
	 */
	public ExecutionContext( EngineTask engineTask )
	{
		if ( engineTask != null )
		{
			task = engineTask;
			engine = task.getEngine( );
			log = task.getLogger( );
		}
		else
		{
			log = Logger.getLogger( ExecutionContext.class.getName( ) );
		}
		locale = Locale.getDefault( );
		ScriptableObject rootScope = null;
		if ( engine != null )