Add 4.0 to debian/changelog
Add 4.0 to debian/changelog

bcoverston/cassandra,sedulam/CASSANDRA-12201,mike-tr-adamson/cassandra,tommystendahl/cassandra,juiceblender/cassandra,pauloricardomg/cassandra,mshuler/cassandra,jrwest/cassandra,aweisberg/cassandra,jbellis/cassandra,tommystendahl/cassandra,aureagle/cassandra,mkjellman/cassandra,juiceblender/cassandra,krummas/cassandra,tommystendahl/cassandra,mshuler/cassandra,joesiewert/cassandra,josh-mckenzie/cassandra,snazy/cassandra,apache/cassandra,iamaleksey/cassandra,adejanovski/cassandra,stef1927/cassandra,aweisberg/cassandra,blerer/cassandra,bdeggleston/cassandra,chbatey/cassandra-1,yhnishi/cassandra,apache/cassandra,jrwest/cassandra,jeffjirsa/cassandra,jasonstack/cassandra,josh-mckenzie/cassandra,beobal/cassandra,blambov/cassandra,aboudreault/cassandra,Instagram/cassandra,aboudreault/cassandra,juiceblender/cassandra,szhou1234/cassandra,kgreav/cassandra,josh-mckenzie/cassandra,belliottsmith/cassandra,chbatey/cassandra-1,hengxin/cassandra,juiceblender/cassandra,jasonwee/cassandra,hengxin/cassandra,stef1927/cassandra,christian-esken/cassandra,kgreav/cassandra,stef1927/cassandra,aboudreault/cassandra,adelapena/cassandra,jeromatron/cassandra,yhnishi/cassandra,driftx/cassandra,belliottsmith/cassandra,stef1927/cassandra,adelapena/cassandra,bdeggleston/cassandra,bcoverston/cassandra,iamaleksey/cassandra,mike-tr-adamson/cassandra,DikangGu/cassandra,clohfink/cassandra,thelastpickle/cassandra,ollie314/cassandra,WorksApplications/cassandra,jrwest/cassandra,joesiewert/cassandra,cooldoger/cassandra,Jollyplum/cassandra,Jollyplum/cassandra,cooldoger/cassandra,driftx/cassandra,mkjellman/cassandra,mike-tr-adamson/cassandra,yukim/cassandra,adejanovski/cassandra,Jollyplum/cassandra,sedulam/CASSANDRA-12201,adelapena/cassandra,michaelsembwever/cassandra,hengxin/cassandra,jasonstack/cassandra,bcoverston/cassandra,mike-tr-adamson/cassandra,jrwest/cassandra,christian-esken/cassandra,szhou1234/cassandra,jasobrown/cassandra,spodkowinski/cassandra,jeromatron/cassandra,chbatey/cassandra-1,christian-esken/cassandra,ollie314/cassandra,ollie314/cassandra,thelastpickle/cassandra,pauloricardomg/cassandra,belliottsmith/cassandra,blambov/cassandra,WorksApplications/cassandra,tommystendahl/cassandra,blerer/cassandra,kgreav/cassandra,ifesdjeen/cassandra,adejanovski/cassandra,yukim/cassandra,Jaumo/cassandra,pauloricardomg/cassandra,jasobrown/cassandra,driftx/cassandra,ifesdjeen/cassandra,bdeggleston/cassandra,sedulam/CASSANDRA-12201,exoscale/cassandra,ifesdjeen/cassandra,thelastpickle/cassandra,kgreav/cassandra,blambov/cassandra,aureagle/cassandra,beobal/cassandra,Instagram/cassandra,Jaumo/cassandra,krummas/cassandra,spodkowinski/cassandra,cooldoger/cassandra,exoscale/cassandra,tjake/cassandra,adelapena/cassandra,ptnapoleon/cassandra,clohfink/cassandra,exoscale/cassandra,clohfink/cassandra,mkjellman/cassandra,beobal/cassandra,jasonwee/cassandra,tjake/cassandra,joesiewert/cassandra,blambov/cassandra,spodkowinski/cassandra,Instagram/cassandra,WorksApplications/cassandra,jasobrown/cassandra,jasonwee/cassandra,jeromatron/cassandra,beobal/cassandra,blerer/cassandra,mshuler/cassandra,driftx/cassandra,instaclustr/cassandra,aweisberg/cassandra,iamaleksey/cassandra,thelastpickle/cassandra,mkjellman/cassandra,iamaleksey/cassandra,jeffjirsa/cassandra,jasobrown/cassandra,michaelsembwever/cassandra,snazy/cassandra,bcoverston/cassandra,mshuler/cassandra,snazy/cassandra,jbellis/cassandra,szhou1234/cassandra,blerer/cassandra,yukim/cassandra,apache/cassandra,tjake/cassandra,pauloricardomg/cassandra,krummas/cassandra,ptnapoleon/cassandra,jasonstack/cassandra,instaclustr/cassandra,aweisberg/cassandra,cooldoger/cassandra,josh-mckenzie/cassandra,ptnapoleon/cassandra,Jaumo/cassandra,belliottsmith/cassandra,krummas/cassandra,Instagram/cassandra,clohfink/cassandra,spodkowinski/cassandra,DikangGu/cassandra,instaclustr/cassandra,tjake/cassandra,michaelsembwever/cassandra,apache/cassandra,DikangGu/cassandra,instaclustr/cassandra,jeffjirsa/cassandra,yukim/cassandra,snazy/cassandra,aureagle/cassandra,WorksApplications/cassandra,yhnishi/cassandra,michaelsembwever/cassandra,jeffjirsa/cassandra,szhou1234/cassandra,jbellis/cassandra,ifesdjeen/cassandra,bdeggleston/cassandra