GraphiteMeterRegistry reports 3 times on close()

[shakuzen]

See #2156. For Micrometer 1.6.0, we will remove the redundant (since Dropwizard metrics-core 4.1.8) call to report when closing the GraphiteMeterRegistry. In order to retain the final publish on close behavior, users should be using at least version 4.1.8 of metrics-core. Earlier versions of metrics-core will result in not having the final publish on close behavior anymore since Micrometer 1.6.0.