Set chunk_size=1 for ND-LAr's final_calibration_mc

For reasons TBD, the final_calibration runs 5x slower when all events
are passed to it at once, even though it shouldn't make a difference.

Author: mjkramer

yamls/ndlar_flow/workflows/charge/final_calibration_mc.yaml

@@ -17,7 +17,7 @@ raw_events:
   path: h5flow.modules
   dset_name: 'charge/raw_events'
   params:
-    chunk_size: 32
+    chunk_size: 1
 
 calib_noise_filter:
   !include yamls/ndlar_flow/reco/charge/CalibNoiseFilter.yaml