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/wallet_pruning.py

@@ -155,4 +155,4 @@ class WalletPruningTest(BitcoinTestFramework):
         self.test_wallet_import_pruned_with_missing_blocks(wallet_birthheight_1)
 
 if __name__ == '__main__':
-    WalletPruningTest().main()
+    WalletPruningTest(__file__).main()