DKG should employ timeout

[nikkolasg]

The current DKG protocol works in synchronous network. Drand should use a timeout to determine whether the protocol is finished after a certain without any messages received. When the timeout triggers, one should call SetTimeout on the dkg handler from kyber to get the distributed key afterwards. Note that usually, the protocol finishes correctly and there's no need to resort to the timeout then.

[nikkolasg]

Done