Bug fix: Rollback fix to use Gossip info while grabbing dead and pre-assigned tokens.
(#825): Rollback the fixes to use Gossip info while grabbing dead and pre-assigned tokens. Gossip info doesn't not reflect the correct cluster state always. A node marked with status as NORMAL in the Gossip info could actually be down. This can be checked using nt ring
. This change will unblock the nodes from joining the ring.