### Environment

* Dubbo version: 2.7.3
* Operating System version: win 10
* Java version: 1.8

系统启动时报
Caused by: java.lang.IllegalArgumentException: Unsupported generic type false
	at org.apache.dubbo.config.ServiceConfig.setGeneric(ServiceConfig.java:1015)

这个错误只有在2.7.3的时候存在，在使用2.7.2的时候没有
protected String version;
    /**
     * The remote service group the customer side will reference
     */
    protected String group;
    public Boolean isCheck() {
        return check;
    }
    public void setCheck(Boolean check) {
        this.check = check;
    }
    public Boolean isInit() {
        return init;
    }
    public void setInit(Boolean init) {
        this.init = init;
    }
    @Deprecated
    @Parameter(excluded = true)
    public Boolean isGeneric() {
        return this.generic != null ? ProtocolUtils.isGeneric(generic) : null;
    }
    @Deprecated
    public void setGeneric(Boolean generic) {
        if (generic != null) {
            this.generic = generic.toString();
        }
    }
    public String getGeneric() {
        return generic;