Prepare debian changelog for 4.0.2
Prepare debian changelog for 4.0.2

mshuler/cassandra,jrwest/cassandra,mike-tr-adamson/cassandra,thelastpickle/cassandra,mike-tr-adamson/cassandra,thelastpickle/cassandra,blambov/cassandra,belliottsmith/cassandra,pauloricardomg/cassandra,jrwest/cassandra,mshuler/cassandra,blambov/cassandra,apache/cassandra,belliottsmith/cassandra,mshuler/cassandra,apache/cassandra,jrwest/cassandra,adelapena/cassandra,apache/cassandra,adelapena/cassandra,tjake/cassandra,mshuler/cassandra,jrwest/cassandra,tjake/cassandra,blambov/cassandra,mike-tr-adamson/cassandra,tjake/cassandra,blambov/cassandra,pauloricardomg/cassandra,instaclustr/cassandra,instaclustr/cassandra,pauloricardomg/cassandra,belliottsmith/cassandra,belliottsmith/cassandra,instaclustr/cassandra,pauloricardomg/cassandra,adelapena/cassandra,tjake/cassandra,apache/cassandra,instaclustr/cassandra,thelastpickle/cassandra,thelastpickle/cassandra,adelapena/cassandra,mike-tr-adamson/cassandra