Bitcoin to NYC3 and update gitian compile code

test/functional/mining_basic.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2014-2019 The Bitcoin Core developers
+# Copyright (c) 2014-2019 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 mining RPCs
@@ -23,7 +23,7 @@ from test_framework.messages import (
 from test_framework.mininode import (
     P2PDataStore,
 )
-from test_framework.test_framework import BitcoinTestFramework
+from test_framework.test_framework import NYC3TestFramework
 from test_framework.util import (
     assert_equal,
     assert_raises_rpc_error,
@@ -40,7 +40,7 @@ def assert_template(node, block, expect, rehash=True):
     assert_equal(rsp, expect)
 
 
-class MiningTest(BitcoinTestFramework):
+class MiningTest(NYC3TestFramework):
     def set_test_params(self):
         self.num_nodes = 2
         self.setup_clean_chain = True