log Compaction Active tasks in StatusLogger instead of n/a

currently StatusLogger log:

logger.info(String.format("%-25s%10s%10s",
                                  "CompactionManager", "n/a", CompactionManager.instance.getPendingTasks()));

It'd be great if it could actually log the number of active tasks being processed. Without looking into the code, I thought there was no compaction running when reading the log.

    public int getActiveCompactions()
    {
        return CompactionExecutor.compactions.size();
    }