Revert "Revert "Merge branch 'STASHDEV-7788-moar-health-monitoring' into atlassian-3.x-integration""

This reverts commit 135868c62568dc7d63cc7bd1d28e11d68f4c1d40.
STASHDEV-7788 Include various statistics about remote operations in the HealthMonitor logging
STASHDEV-7788 Only start collecting remote operation stats when somebody asks for them.
This means if you don't enable HealthMonitor you should get little or no overhead.
Merge pull request #8 from atlassian/STASHDEV-7855-log-local-and-remote-op-counts

STASHDEV-7788 Include various statistics about remote operations in the HealthMonitor logging