test: speedup wallet tests by whitelisting peers (immediate tx relay)

test/functional/wallet_bumpfee.py

@@ -53,6 +53,7 @@ class BumpFeeTest(BitcoinTestFramework):
             "-walletrbf={}".format(i),
             "-mintxfee=0.00002",
             "-addresstype=bech32",
+            "-whitelist=noban@127.0.0.1",
         ] for i in range(self.num_nodes)]
 
     def skip_test_if_missing_module(self):