cls_replica_log_types.h: pass const std::list<> by reference

Pass  const std::list<> parameter by refrence to
cls_replica_log_progress_marker().

From cppcheck:
 [src/cls/replica_log/cls_replica_log_types.h:64]: (performance)
  Function parameter 'b' should be passed by reference.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>