This adds a stub implementation to the compaction_manager.
The API would return the currect type but with stub values.
After this patch the following url will be available:
/compaction_manager/metrics/pending_tasks
/compaction_manager/metrics/completed_tasks
/compaction_manager/metrics/total_compactions_completed
/compaction_manager/metrics/bytes_compacted
Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
477d06aa96