Use COINBASE_MATURITY constant in functional tests.

test/functional/wallet_abandonconflict.py

@@ -12,6 +12,7 @@
 """
 from decimal import Decimal
 
+from test_framework.blocktools import COINBASE_MATURITY
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
@@ -28,7 +29,7 @@ class AbandonConflictTest(BitcoinTestFramework):
         self.skip_if_no_wallet()
 
     def run_test(self):
-        self.nodes[1].generate(100)
+        self.nodes[1].generate(COINBASE_MATURITY)
         self.sync_blocks()
         balance = self.nodes[0].getbalance()
         txA = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), Decimal("10"))