Dependency management for Micrometer is incomplete

[wilkinsona]

In 2.0, we're missing dependency management for the following modules:

• io.micrometer:micrometer-jersey2
• io.micrometer:micrometer-spring-legacy
• io.micrometer:micrometer-test

Using io.micrometer:micrometer-spring-legacy does not make sense in the context of a Spring Boot app. We should add dependency management for the other two modules though.

[wilkinsona]

And in 2.1 we're missing io.micrometer:micrometer-registry-azure-monitor as well.