Add licenses for tests and test data

- Add license headers to source files (years based on commit dates)
  in `src/test` as well as `qa`
- Add `README.md` to `src/test/data` specifying MIT license

Fixes #3848

qa/rpc-tests/conflictedbalance.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 # Test marking of spent outputs
 

qa/rpc-tests/listtransactions.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 # Exercise the listtransactions API
 

qa/rpc-tests/send.sh

@@ -1,4 +1,7 @@
 #!/bin/bash
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 TIMEOUT=10
 SIGNAL=HUP
 PIDFILE=.send.pid

qa/rpc-tests/skeleton.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 # Skeleton for python-based regression tests using
 # JSON-RPC

qa/rpc-tests/txnmall.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 # Test proper accounting with malleable transactions
 

qa/rpc-tests/util.py

@@ -1,3 +1,6 @@
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #
 # Helpful routines for regression testing
 #

qa/rpc-tests/util.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 # Functions used by more than one test
 

qa/rpc-tests/wallet.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2013-2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 # Test block generation and basic wallet sending
 

qa/rpc-tests/walletbackup.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 # Test wallet backup / dump / restore functionality