### 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
builder.check(true).init(false).generic(true).injvm(false).lazy(true).reconnect("reconnect").sticky(false)
                .version("version").group("group").id("id").prefix("prefix");
        ReferenceConfig config = builder.build();
        ReferenceConfig config2 = builder.build();
        Assertions.assertEquals("id", config.getId());
        Assertions.assertEquals("prefix", config.getPrefix());
        Assertions.assertTrue(config.isCheck());
        Assertions.assertFalse(config.isInit());
        Assertions.assertTrue(config.isGeneric());
        Assertions.assertFalse(config.isInjvm());
        Assertions.assertTrue(config.getLazy());
        Assertions.assertFalse(config.getSticky());
        Assertions.assertEquals("reconnect", config.getReconnect());
        Assertions.assertEquals("version", config.getVersion());
        Assertions.assertEquals("group", config.getGroup());
        Assertions.assertNotSame(config, config2);
    }
    private static class ReferenceBuilder extends AbstractReferenceBuilder<ReferenceConfig, ReferenceBuilder> {
        public ReferenceConfig build() {
            ReferenceConfig parameterConfig = new ReferenceConfig();
            super.build(parameterConfig);
            return parameterConfig;
        }
        @Override
        protected ReferenceBuilder getThis() {
            return this;
        }
    }
    private static class ReferenceConfig extends AbstractReferenceConfig { }
}