Recover from error in RequestOrderedCommittee()

[gadcl]

When failing to read the elected validators' state - currently LH steps down and only waits for sync.
This is not robust enough - as we encountered multiple nodes facing the same issue - i.e. there were not enough nodes to make any progress (close blocks).
A possible solution is to check on UpdateState signal - and retry to enter term as part of committee if the node has stepped down - i.e. try to wake up the consensus again