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
"loading external script file " + fileName + " failed.", 
					ex );
			addException( new EngineException(
					MessageConstants.SCRIPT_FILE_LOAD_ERROR, url.toString( ),
					ex ) ); 
			
		}
	}
	/**
	 * get current scope
	 * 
	 * @return scope object
	 */
	public Scriptable getScope( )
	{
		return scriptContext.getScope( );
	}
	public Scriptable getSharedScope( )
	{
		return scriptContext.getSharedScope( );
	}
	ScriptContext getScriptContext( )
	{
		return this.scriptContext;
	}
	/**
	 * @return
	 */
	public IContent getContent( )
	{