message: fix restart-round test
diff: @@ -94,7 +94,8 @@ def test_restart_round():
  transit(st, hb)
  assert st.lookup() == (ParState.WAITING_FOR_SELECTION, 8)
  hb.state = coordinator_pb2.ROUND
  - # but still in round 8! => the round was restarted
  + hb.round = 8 # but still in round 8!
  + # => the round was restarted (under current assumptions)
  transit(st, hb)
  - # re-do the training...
  + # => re-do the training...
  assert st.lookup() == (ParState.TRAINING, 8)
  