### 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
}
    public ProviderConfig getProvider() {
        return provider;
    }
    public void setProvider(ProviderConfig provider) {
        ConfigManager.getInstance().addProvider(provider);
        this.provider = provider;
    }
    @Parameter(excluded = true)
    public String getProviderIds() {
        return providerIds;
    }
    public void setProviderIds(String providerIds) {
        this.providerIds = providerIds;
    }
    public String getGeneric() {
        return generic;
    }
    public void setGeneric(String generic) {
        if (StringUtils.isEmpty(generic)) {
            return;
        }
        if (ProtocolUtils.isGeneric(generic)) {
            this.generic = generic;
        } else {
            throw new IllegalArgumentException("Unsupported generic type " + generic);
        }
    }
    @Override
    public void setMock(Boolean mock) {