Restore

When restoring data, user provides Priam with the start and end time's for the restore, Priam downloads all the keyspace snapshot files along with any incremental (if enabled) from S3 and orchestrates the stopping and starting of the Cassandra process. During this process we also backup the nodes schema file's but we remove the ring information where the original backup happened to have a clean cluster after restore, this allows us to restore the cluster with 1/2 the size of the existing cluster (Skipping alternate nodes) and run repair to regain the data which was skipped. Restoring to a different sized cluster is supported only for the Keyspaces with replication factor more than 1.