### 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
}
    @Test
    void reconnect() {
        ReferenceBuilder builder = new ReferenceBuilder();
        builder.reconnect("reconnect");
        Assertions.assertEquals("reconnect", builder.build().getReconnect());
    }
    @Test
    void sticky() {
        ReferenceBuilder builder = new ReferenceBuilder();
        builder.sticky(true);
        Assertions.assertTrue(builder.build().getSticky());
        builder.sticky(false);
        Assertions.assertFalse(builder.build().getSticky());
    }
    @Test
    void version() {
        ReferenceBuilder builder = new ReferenceBuilder();
        builder.version("version");
        Assertions.assertEquals("version", builder.build().getVersion());
    }
    @Test
    void group() {
        ReferenceBuilder builder = new ReferenceBuilder();
        builder.group("group");
        Assertions.assertEquals("group", builder.build().getGroup());
    }
    @Test
    void build() {
        ReferenceBuilder builder = new ReferenceBuilder();