consensus/bor: log err when commit span fails (#1413)

* consensus/bor: log err in commit span

* consensus/bor: fix lint

Author: manav2401

consensus/bor/statefull/processor.go

@@ -100,6 +100,11 @@ func ApplyMessage(
 		log.Error("message execution failed on contract", "msgData", msg.Data)
 	}
 
+	// If there's error committing span, log it here. It won't be reported before because the return value is empty.
+	if bytes.Equal(msg.To().Bytes(), validatorContract.Bytes()) && err != nil {
+		log.Error("message execution failed on contract", "err", err)
+	}
+
 	// Update the state with pending changes
 	if err != nil {
 		state.Finalise(true)