Bitcoin to NYC3 and update gitian compile code

test/functional/wallet_fallbackfee.py

@@ -1,12 +1,12 @@
 #!/usr/bin/env python3
-# Copyright (c) 2017-2018 The Bitcoin Core developers
+# Copyright (c) 2017-2018 The NYC3 Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test wallet replace-by-fee capabilities in conjunction with the fallbackfee."""
-from test_framework.test_framework import BitcoinTestFramework
+from test_framework.test_framework import NYC3TestFramework
 from test_framework.util import assert_raises_rpc_error
 
-class WalletRBFTest(BitcoinTestFramework):
+class WalletRBFTest(NYC3TestFramework):
     def set_test_params(self):
         self.num_nodes = 1
         self.setup_clean_chain = True