Run tests which require network timeout using the same config as mainnet

[coot]

Test which do not involve network timeouts & delays (e.g. shutting down nodes), one can run using a face pace blockchain (e.g. small k, etc). However for tests which do involve them, we should run them using the same parameters as mainnet. In first iteraction we could do even something simple as running a single eara in which we check if nodes can be disconnected and they will reconnect. A more advanced setup, would require a fast forward transition to the most recent era, in which parameters would change to what mainnet is using and then run network tests.