message: test: Fix intermittent issue in wallet_import_rescan
diff: @@ -182,6 +182,7 @@ class ImportRescanTest(BitcoinTestFramework):
  self.nodes[0].generate(1) # Generate one block for each send
  variant.confirmation_height = self.nodes[0].getblockcount()
  variant.timestamp = self.nodes[0].getblockheader(self.nodes[0].getbestblockhash())["time"]
  + self.sync_all() # Conclude sync before calling setmocktime to avoid timeouts
  # Generate a block further in the future (past the rescan window).
  assert_equal(self.nodes[0].getrawmempool(), [])
  