Spring-boot: Include Spring Boot Version in InfoContributor

[Sarvesh-D]

There are many dashboards available for visualizing data provided by the /actuator endpoints in a spring boot app. It would be nice to include the Spring Boot Version provided by SpringBootVersion.getVersion() method inside InfoContributor by default. A similar request https://github.com/spring-cloud/spring-cloud-commons/issues/421 as been created for Spring Cloud Version.

[bclozel]

I don't think that including by default the Spring Boot version information on the /info endpoint (which is exposed by default) is a great idea. In case a CVE is reported against a particular Spring Boot version, this makes things really easy to scan for vulnerable applications.

[snicoll]

Agreed with @bclozel - Also info has been historically empty by default and I'd like to keep it that way.

[wilkinsona]

We already have SimpleInfoContributor and SpringBootVersion that can be used to opt in to this behaviour:

@Bean
public SimpleInfoContributor springBootVersionInfoContributor() {
    return new SimpleInfoContributor("spring-boot-version", SpringBootVersion.getVersion());
}

Given the security concern raised by @bclozel, I don't think we should do anything more here.