Swap order of dicts for DeepDiff

tests/test_reference_runs/test_pre_deployment.py

@@ -374,7 +374,7 @@ def test_xfel_calibrate(
             out_folder / metadata_file).get("retrieved-constants", {})
         ccvs_reference = load_yaml(
             reference_folder / metadata_file).get("retrieved-constants", {})
-        ccvs_diff = DeepDiff(ccvs_test, ccvs_reference, ignore_order=True)
+        ccvs_diff = DeepDiff(ccvs_reference, ccvs_test, ignore_order=True)
         assert ccvs_diff == {}, "Found difference in the metadata for the retrieved Constants."  # noqa
         LOGGER.info("Retrieved CCVs validated.")