add default group

mall-service/src/main/resources/bootstrap.properties

@@ -52,6 +52,7 @@ dubbo.scan.base-packages=com.txz.${spring.application.name}.dubbo.impl
 dubbo.application.qos.enable=false
 dubbo.application.qos.port=28201
 dubbo.application.qos.accept.foreign.ip=true
+dubbo.registry.group=
 
 dubbo.reference.com.foo.BarService.check=false
 dubbo.reference.check=false