US712 - Remove old JMX and monitoring code
(cherry picked from commit 15cf6cd)
US712 - Add metrics play plugin plus a cache counter
(cherry picked from commit e4ce982)
US712 - Refactor
(cherry picked from commit f0f9360)
US712 - Ensure metrics on
US712 - DB connection config not needed
US712 - Circs employment routes not needed
US712 - Turn metrics on but no reporter
(cherry picked from commit 64abe06)