Merge bitcoin/bitcoin#28321: test: Fix intermittent issue in mempool_reorg

fa5cc3c test: Fix intermittent issue in mempool_reorg (MarcoFalke)

Pull request description:

  Currently the test case may fail intermittently, see bitcoin/bitcoin#28313

  Fix this by changing a number and reducing the failure rate a bit.

ACKs for top commit:
  glozow:
    ACK fa5cc3c

Tree-SHA512: ff552111b434ca712c7dbdc5ba32a986a6fa4512cba5a756234eae69428063bf6ecfdc8f350ee84226ed4d3e4262b4639dbe49162a722e8da85f0d61e5690c51

Author: fanquake

test/functional/mempool_reorg.py

@@ -68,8 +68,8 @@ def test_reorg_relay(self):
         assert_equal(self.nodes[1].getmempoolentry(tx_child["txid"])["ancestorcount"], 2)
         assert_equal(self.nodes[1].getmempoolentry(tx_before_reorg["txid"])["ancestorcount"], 1)
 
-        # peer1 should not have received an inv for any of the transactions during this time, as not
-        # enough time has elapsed for those transactions to be announced. Likewise, it cannot
+        # peer1 should not have received an inv for any of the transactions during this time, as no
+        # mocktime has elapsed for those transactions to be announced. Likewise, it cannot
         # request very recent, unanounced transactions.
         assert_equal(len(peer1.get_invs()), 0)
         # It's too early to request these two transactions
@@ -92,7 +92,7 @@ def test_reorg_relay(self):
             # However, the node will answer requests for the tx from the recently-disconnected block.
             assert_equal(peer1.last_message["tx"].tx.getwtxid(),tx_disconnected["tx"].getwtxid())
 
-        self.nodes[1].setmocktime(int(time.time()) + 30)
+        self.nodes[1].setmocktime(int(time.time()) + 300)
         peer1.sync_with_ping()
         # the transactions are now announced
         assert_equal(len(peer1.get_invs()), 3)