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
{
			Object scope = engine.getRootScope( );
			if ( scope instanceof ScriptableObject )
			{
				rootScope = (ScriptableObject) scope;
			}
		}
		if ( rootScope != null )
		{
			scriptContext = new ScriptContext( rootScope );
		}
		else
		{
			scriptContext = new ScriptContext( );
		}
		
		scriptContext.getContext( ).setLocale( locale );
		initailizeScriptContext( scriptContext.getContext( ), scriptContext
				.getRootScope( ) );
		
		
		scriptContext.registerBean( "report", new ReportObject( ) );
		scriptContext
				.registerBean(
						"params", new ScriptableParameters( params, scriptContext.getScope( ) ) ); 
		scriptContext.registerBean( "config", configs ); 
		scriptContext.registerBean( "currentPage", new Long( pageNumber ) );
		scriptContext.registerBean( "totalPage", new Long( totalPage ) );
		scriptContext.registerBean( "_jsContext", this );
		scriptContext