实战组合模式代码可能有点问题

代码地址：https://github.com/fuzhengwei/itstack-demo-design/blob/master/itstack-demo-design-8-02/src/main/java/org/itstack/demo/design/domain/service/engine/EngineConfig.java#L18

改动点：static Map<String, LogicFilter> logicFilterMap; --> public static Map<String, LogicFilter> logicFilterMap;