### 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
* The interface class of the exported service
     */
    private Class<?> interfaceClass;
    /**
     * The reference of the interface implementation
     */
    private T ref;
    /**
     * The service name
     */
    private String path;
    /**
     * The method configuration
     */
    private List<MethodConfig> methods;
    /**
     * The provider configuration
     */
    private ProviderConfig provider;
    /**
     * The providerIds
     */
    private String providerIds;
    /**
     * Whether the provider has been exported
     */
    private transient volatile boolean exported;
    /**
     * The flag whether a service has unexported ,if the method unexported is invoked, the value is true
     */