test: refactor: deduplicate DEFAULT_{ANCESTOR,DESCENDANT}_LIMIT constants

test/functional/mempool_package_onemore.py

@@ -7,6 +7,9 @@
    size.
 """
 
+from test_framework.messages import (
+    DEFAULT_ANCESTOR_LIMIT,
+)
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
@@ -15,10 +18,6 @@ from test_framework.util import (
 from test_framework.wallet import MiniWallet
 
 
-DEFAULT_ANCESTOR_LIMIT = 25
-DEFAULT_DESCENDANT_LIMIT = 25
-
-
 class MempoolPackagesTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1