[suggestion]dubbo-spring-boot-starter add spring-boot-actuator dependency

[thc75]

Now the provider and consumer both depend spring-boot-actuator in pom.xml. Maybe dubbo-spring-boot-starter add spring-boot-actuator dependency

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-actuator</artifactId>
        </dependency>

then provider or consumer use dubbo-spring-boot-starter only.

[mercyblitz]

Since the compatibility of Spring Boot is not well , It should not be implied dependencies, it'd better to add spring-boot-* dependencies by application.