There are occasional failures of example_test on travis, which are annoying but not critical.

It will timeout while waiting for an verack on the added p2p connection:

self.nodes[2].p2p.wait_for_verack()

The issue might be that we add a p2p connection in L134 and then start the network thread:

Afterward, we don't restart the network thread, but add yet another p2p connection:

I have slight doubt that this is expected to work.