scripted-diff: Use generate* from TestFramework

-BEGIN VERIFY SCRIPT-
 sed --regexp-extended -i \
     's/((self\.)?(nodes\[[^]]+\]|[a-z_]*(wallet|node)[0-9a-z_]*))\.(generate(|toaddress|block|todescriptor)(\(|, ))/self.\5\1, /g' \
     $(git grep -l generate ./test | grep -v 'test_framework/' | grep -v 'feature_rbf')
-END VERIFY SCRIPT-

test/functional/mempool_package_onemore.py

@@ -30,7 +30,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
 
     def run_test(self):
         # Mine some blocks and have them mature.
-        self.nodes[0].generate(COINBASE_MATURITY + 1)
+        self.generate(self.nodes[0], COINBASE_MATURITY + 1)
         utxo = self.nodes[0].listunspent(10)
         txid = utxo[0]['txid']
         vout = utxo[0]['vout']