Prepare debian changelog for 3.11.8
Prepare debian changelog for 3.11.8

belliottsmith/cassandra,krummas/cassandra,driftx/cassandra,blambov/cassandra,adelapena/cassandra,scylladb/scylla-tools-java,apache/cassandra,adejanovski/cassandra,blerer/cassandra,strapdata/cassandra,adelapena/cassandra,michaelsembwever/cassandra,thelastpickle/cassandra,thelastpickle/cassandra,thelastpickle/cassandra,beobal/cassandra,mike-tr-adamson/cassandra,strapdata/cassandra,krummas/cassandra,jrwest/cassandra,thelastpickle/cassandra,strapdata/cassandra,bdeggleston/cassandra,michaelsembwever/cassandra,mike-tr-adamson/cassandra,tjake/cassandra,scylladb/scylla-tools-java,blambov/cassandra,michaelsembwever/cassandra,apache/cassandra,blambov/cassandra,driftx/cassandra,belliottsmith/cassandra,belliottsmith/cassandra,blerer/cassandra,bdeggleston/cassandra,bdeggleston/cassandra,driftx/cassandra,belliottsmith/cassandra,mshuler/cassandra,adelapena/cassandra,scylladb/scylla-tools-java,tjake/cassandra,pauloricardomg/cassandra,blerer/cassandra,instaclustr/cassandra,jrwest/cassandra,apache/cassandra,instaclustr/cassandra,beobal/cassandra,mike-tr-adamson/cassandra,beobal/cassandra,szhou1234/cassandra,michaelsembwever/cassandra,adejanovski/cassandra,instaclustr/cassandra,pauloricardomg/cassandra,tjake/cassandra,strapdata/cassandra,adejanovski/cassandra,driftx/cassandra,beobal/cassandra,pauloricardomg/cassandra,adelapena/cassandra,mshuler/cassandra,szhou1234/cassandra,blerer/cassandra,krummas/cassandra,szhou1234/cassandra,mike-tr-adamson/cassandra,tjake/cassandra,szhou1234/cassandra,bdeggleston/cassandra,mshuler/cassandra,instaclustr/cassandra,pauloricardomg/cassandra,apache/cassandra,jrwest/cassandra,mshuler/cassandra,blambov/cassandra,krummas/cassandra,scylladb/scylla-tools-java,jrwest/cassandra