ZDC clustering

Read ZDC sampling fractions from calibrations json file.

• add calibrations json file in detectors/athena and check that it picks this up

options/reconstruction.py

@@ -42,7 +42,7 @@ try:
                     eval(ffi_zdc_cal['localDistXY'][0]),
                     eval(ffi_zdc_cal['localDistXY'][1])
                 ],
-                'splitCluster': bool(ffi_zdc_cal['splitCluster')
+                'splitCluster': bool(ffi_zdc_cal['splitCluster'))
             }
             return ffi_zdc_cal_sf, ffi_zdc_cal_cl
         ffi_zdc_ecal_sf, ffi_zdc_ecal_cl_kwargs = ffi_zdc_cal_parse(ffi_zdc_ecal)