test: resort imports

test/functional/mempool_persist.py

@@ -39,8 +39,8 @@ from decimal import Decimal
 import os
 import time
 
-from test_framework.test_framework import BitcoinTestFramework
 from test_framework.p2p import P2PTxInvStore
+from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
     assert_greater_than_or_equal,