[tests] don't override __init__() in individual tests

Almost all test scripts currently need to override the __init__()
method. When they do that they need to call into super().__init__() as
the base class does some generic initialization.

This commit makes the base class __init__() call into set_test_params()
method. Individual test cases can override set_test_params() to setup
their test parameters.

1 files changed, 1 insertions, 4 deletions

diff --git a/test/functional/listtransactions.py b/test/functional/listtransactions.py
index 9b97028417..5ee85a0dac 100755
--- a/test/functional/listtransactions.py
+++ b/test/functional/listtransactions.py
@@ -16,10 +16,7 @@ def txFromHex(hexstring):
     return tx
 
 class ListTransactionsTest(BitcoinTestFramework):
-    def __init__(self):
-        super().__init__()
-        self.num_nodes = 4
-        self.setup_clean_chain = False
+    def set_test_params(self):
         self.enable_mocktime()
 
     def run_test(self):