dags/layers/inspiral.py: track databases for file transfer in compute far layer

gstlal-inspiral/python/dags/layers/inspiral.py

@@ -595,17 +595,22 @@ def compute_far_layer(config, dag, trigger_cache, pdf_cache):
 
 	inj_triggers = inj_trigger_cache.groupby("time")
 	for span, noninj_triggers in noninj_trigger_cache.groupby("time").items():
+		databases = noninj_triggers.files
 		inputs = [
 			Option("non-injection-db", noninj_triggers.files),
 			Option("background-bins-file", pdf_cache.files),
 		]
 		if inj_triggers:
 			inputs.append(Option("injection-db", inj_triggers[span].files))
+			databases.extend(inj_triggers[span].files)
 
 		layer += Node(
 			arguments = Option("tmp-space", dagutil.condor_scratch_space()),
 			inputs = inputs,
-			outputs = Option("output-background-bins-file", post_pdf_cache.files),
+			outputs = [
+				Option("output-background-bins-file", post_pdf_cache.files),
+				Argument("databases", databases, suppress=True),
+			]
 		)
 
 	dag.attach(layer)