### 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
provider.setParameters(protocol.getParameters());
        return provider;
    }
    private static Integer getRandomPort(String protocol) {
        protocol = protocol.toLowerCase();
        return RANDOM_PORT_MAP.getOrDefault(protocol, Integer.MIN_VALUE);
    }
    private static void putRandomPort(String protocol, Integer port) {
        protocol = protocol.toLowerCase();
        if (!RANDOM_PORT_MAP.containsKey(protocol)) {
            RANDOM_PORT_MAP.put(protocol, port);
            logger.warn("Use random available port(" + port + ") for protocol " + protocol);
        }
    }
    public URL toUrl() {
        return urls.isEmpty() ? null : urls.iterator().next();
    }
    public List<URL> toUrls() {
        return urls;
    }
    @Parameter(excluded = true)
    public boolean isExported() {
        return exported;
    }
    @Parameter(excluded = true)
    public boolean isUnexported() {
        return unexported;
    }
    public void checkAndUpdateSubConfigs() {
        //