Priam will check gossip info while grabbing pre-assigned token.
- Priam will check Cassandra gossip information while grabbing pre-assigned token to decide if it should start Cassandra in bootstrap mode or in replace mode.
- At most 3 random nodes are used to get the gossip information.
- Moved token owner inferring logic based on Cassandra gossip into a util class.
- Refactored InstanceIdentity.init() method.