scripted-diff: Add __file__ argument to BitcoinTestFramework.init()

-BEGIN VERIFY SCRIPT-
sed -i -e 's/\s*().main\s*()/(__file__).main()/' $(git ls-files test/functional/*.py)
sed -i -e 's/def __init__(self)/def __init__(self, test_file)/' test/functional/test_framework/test_framework.py
-END VERIFY SCRIPT-

test/functional/p2p_tx_privacy.py

@@ -74,4 +74,4 @@ class TxPrivacyTest(BitcoinTestFramework):
         spy.wait_for_inv_match(CInv(MSG_WTX, tx2.calc_sha256(True)))
 
 if __name__ == '__main__':
-    TxPrivacyTest().main()
+    TxPrivacyTest(__file__).main()