Allow for resynchronizing of failed-over node after rebalance

Customer request to allow for a node that has not had a catastrophic failure to re-use it's data on disk when rejoining a cluster (after it has been failed over).

This goes a long with being able to support larger datasets on each node. By forcing a rebalance after failover, we are potentially copying 100's of GB of data over the network when it is seemingly unnecessary. Not only does this take quite a bit of time over the network, it is using network bandwidth unnecessarily (potentially impacting performance) and resynchronizing from disk would alleviate this and speed up the process considerably.