support nch/cent axis switch in multiplet

Author: EmilGorm

PWGCF/GenericFramework/Tasks/flowGfwNonflow.cxx

@@ -420,7 +420,7 @@ struct FlowGfwNonflow {
     delete oba;
 
     // Identify unique multiplet setups and populate with identifying keys
-    identifyUniqueMultipletKeys(multipletKeys, corrconfigs, centAxis); // For now keep centrality axis hardcoded
+    identifyUniqueMultipletKeys(multipletKeys, corrconfigs, multAxis);
     LOGF(info, "Unique multiplet keys for current configuration setup");
     for (const auto& key : multipletKeys) {
       LOGF(info, key);