Confusing outdated view info in cluster state

[engelsanchez]

Currently the cluster state record managed by the root ensemble and the managers contains information for ensembles that is not kept up to date. For example, if you create a 3 node cluster in Riak with strong consistency on, and later add a 4th node, the ensemble information you get by querying the root ensemble directly or riak_ensemble_manager:known_ensembles() will contain the original views for the ensembles, likely different to what you get when calling riak_ensemble_manager:get_views(EnsembleId). The up to date views are only kept in the ensemble facts and in the manager's ensemble_data field in its state.

Related to this, the update_ensemble function in riak_ensemble_root is not really used and would not work as the views information it manages is not really used. Obviously this has changed as riak_ensemble has evolved since the first version. It would be nice to clean it up and remove the redundant and potentially misleading information.