SSB-47: improved logging

CAL/CalibrationCommon/lib/datacontainers/holography_observation.py

@@ -111,6 +111,7 @@ def list_observations_in_path(path):
             sas_id = match.group('sas_id')
 
             try:
+                logging.debug('Processing ms in path %s', root)
                 ms_indexed_per_beamlet_number = create_ms_dict_from_ms_name_list_and_path(dirnames,
                                                                                           root)