Swap order of dicts for DeepDiff

If there are changes, DeepDiff labels values from the first dict as old_value and values from the second as new_value. This meant the reference value was the 'new' one, causing us some confusion.

cc @ahmedk

LGTM

OK, this is the way we expect now:

                      "root['AGIPD02']['constants']['Noise']['ccv_id']": {'new_value': 202755,
                                                                          'old_value': 84950},
                      "root['AGIPD02']['constants']['Noise']['path']": {'new_value': '/gpfs/exfel/d/cal/caldb_store/xfel/cal/agipd-type/agipd_siv1_agipdv11_m314/cal.1714487030.0868747.h5',
                                                                        'old_value': '/gpfs/exfel/d/cal/caldb_store/xfel/cal/agipd-type/agipd_siv1_agipdv11_m314/cal.1627676400.0333762.h5'},

merged

mentioned in commit 2a7962c5

Thanks @kluyvert, I think you are good to merge. I guess for now the only solution is for me to update the reference data.

I will leave this question for tomorrow to confirm in case anyone have another opinion

changed milestone to %3.15.0