[wallet] [tests] Add listwallets to multiwallet test

test/functional/test_runner.py

@@ -89,6 +89,7 @@ BASE_SCRIPTS= [
     'mempool_spendcoinbase.py',
     'mempool_reorg.py',
     'mempool_persist.py',
+    'multiwallet.py',
     'httpbasics.py',
     'multi_rpc.py',
     'proxy_test.py',