tests: Stop node before removing the notification file

Author: ken2812221

test/functional/feature_notifications.py

@@ -51,12 +51,13 @@ def run_test(self):
             # directory content should equal the generated transaction hashes
             txids_rpc = list(map(lambda t: t['txid'], self.nodes[1].listtransactions("*", block_count)))
             assert_equal(sorted(txids_rpc), sorted(os.listdir(self.walletnotify_dir)))
+            self.stop_node(1)
             for tx_file in os.listdir(self.walletnotify_dir):
                 os.remove(os.path.join(self.walletnotify_dir, tx_file))
 
             self.log.info("test -walletnotify after rescan")
             # restart node to rescan to force wallet notifications
-            self.restart_node(1)
+            self.start_node(1)
             connect_nodes_bi(self.nodes, 0, 1)
 
             wait_until(lambda: len(os.listdir(self.walletnotify_dir)) == block_count, timeout=10)