Remove the JMXManageable/JMXBean from the configuration service. Update
one (known) YAML using that service.
Delete dead code.
Delete the now unused ConfigurationServiceMXBean.
merge tjoneslo: Remove JMX access to configuration service

Merge pull request #1442 from tjoneslo/sql-layer/remove-jxm-configuration-access
https://github.com/FoundationDB/sql-layer/pull/1442