tests: Mark functional tests not supporting bitcoin-cli (--usecli) as such

test/functional/wallet_txn_doublespend.py

@@ -16,6 +16,7 @@ from test_framework.util import (
 class TxnMallTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 4
+        self.supports_cli = False
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()