Add in option to override scaler json file. Correct which json file is overriden for Run 4.

Author: gputnam

fcl/detsim/detsim_2d_icarus_refactored_yzsim_Run4.fcl

@@ -1,3 +1,3 @@
 #include "detsim_2d_icarus_refactored_yzsim.fcl"
 
-physics.producers.daq.wcls_main.params.YZMapJson: "yzmap_gain_icarus_v4_run4.json"
+physics.producers.daq.wcls_main.params.YZScaleMapJson: "yzmap_gain_icarus_v4_run4.json"

fcl/detsim/detsim_2d_icarus_refactored_yzsim_overlay_Run4.fcl

@@ -1,3 +1,3 @@
 #include "detsim_2d_icarus_refactored_yzsim_overlay.fcl"
 
-physics.producers.daq.wcls_main.params.YZMapJson: "yzmap_gain_icarus_v4_run4.json"
+physics.producers.daq.wcls_main.params.YZScaleMapJson: "yzmap_gain_icarus_v4_run4.json"

icaruscode/TPC/ICARUSWireCell/detsimmodules_wirecell_ICARUS.fcl

@@ -38,6 +38,7 @@ icarus_simwire_wirecell:
 	    cathode_input_format: "array" # scalar (flat) or array (bent)
             SimEnergyDepositLabel: "ionization"
             # yz map config -- default to Run 2
+            YZScaleMapJson: "yzmap_gain_icarus_v4_run2.json"
             YZMapJson: "yzmap_icarus_v3_run2.json"
             DBFileName: "tpc_elifetime_data"
             DBTag: @local::ICARUS_Calibration_GlobalTags.tpc_elifetime_data

icaruscode/TPC/ICARUSWireCell/icarus/wcls-multitpc-sim-drift-simchannel-yzsim-refactored.jsonnet

@@ -221,7 +221,7 @@ local scalers = [{
         type: "Scaler",
 	name: "scaler%d" %n, //%std.floor(n/45),
         data: params.lar {
-	        	 yzmap_scale_filename: 'yzmap_gain_icarus_v4_run2.json',
+	        	 yzmap_scale_filename: std.extVar('YZScaleMapJson'),
 			 bin_width:  10*wc.cm,
 			 tpc_width: 1500*wc.mm,
 			 bin_height: 10*wc.cm,