message: test: fix: remove outdated TestNode.generate calls
  Currently failing on CI. After this change the test itself still fails,
  but at least it's apparently for a non-incidental reason.
diff: @@ -244,17 +244,17 @@ class ListTransactionsTest(BitcoinTestFramework):
  self.log.info("Send to externally generated addresses")
  # send to an address beyond the next to be generated to test the keypool gap
  self.nodes[1].sendtoaddress(addr3, "0.001")
  - self.nodes[1].generate(1)
  + self.generate(self.nodes[1], 1)
  self.sync_all()
  # send to an address that is already marked as used due to the keypool gap mechanics
  self.nodes[1].sendtoaddress(addr2, "0.001")
  - self.nodes[1].generate(1)
  + self.generate(self.nodes[1], 1)
  self.sync_all()
  # send to self transaction
  self.nodes[0].sendtoaddress(addr1, "0.001")
  - self.nodes[0].generate(1)
  + self.generate(self.nodes[0], 1)
  self.sync_all()
  self.log.info("Verify listtransactions is the same regardless of where the address was generated")
  