avoid NPE on describe cf with no compaction strategy (local)
avoid NPE on describe cf with no compaction strategy (local)

yhnishi/cassandra,DavidHerzogTU-Berlin/cassandra,MasahikoSawada/cassandra,dongjiaqiang/cassandra,emolsson/cassandra,vramaswamy456/cassandra,RyanMagnusson/cassandra,tongjixianing/projects,fengshao0907/cassandra-1,clohfink/cassandra,nlalevee/cassandra,stef1927/cassandra,stef1927/cassandra,phact/cassandra,aweisberg/cassandra,juiceblender/cassandra,iamaleksey/cassandra,mambocab/cassandra,DICL/cassandra,jeffjirsa/cassandra,snazy/cassandra,joesiewert/cassandra,WorksApplications/cassandra,ben-manes/cassandra,bmel/cassandra,guard163/cassandra,tommystendahl/cassandra,snazy/cassandra,mkjellman/cassandra,macintoshio/cassandra,rdio/cassandra,aweisberg/cassandra,mshuler/cassandra,clohfink/cassandra,sbtourist/cassandra,Jollyplum/cassandra,josh-mckenzie/cassandra,jasonstack/cassandra,michaelsembwever/cassandra,ejankan/cassandra,gdusbabek/cassandra,guard163/cassandra,hhorii/cassandra,pkdevbox/cassandra,chaordic/cassandra,lalithsuresh/cassandra-c3,blambov/cassandra,boneill42/cassandra,thelastpickle/cassandra,cooldoger/cassandra,pallavi510/cassandra,a-buck/cassandra,rogerchina/cassandra,jasonstack/cassandra,weideng1/cassandra,pcn/cassandra-1,dprguiuc/Cassandra-Wasef,sluk3r/cassandra,strapdata/cassandra,jasobrown/cassandra,chbatey/cassandra-1,DICL/cassandra,matthewtt/cassandra_read,jasonstack/cassandra,helena/cassandra,blerer/cassandra,adejanovski/cassandra,mheffner/cassandra-1,jbellis/cassandra,JeremiahDJordan/cassandra,DikangGu/cassandra,Stratio/stratio-cassandra,Jollyplum/cassandra,carlyeks/cassandra,jeffjirsa/cassandra,tongjixianing/projects,driftx/cassandra,LatencyUtils/cassandra-stress2,yhnishi/cassandra,rmarchei/cassandra,yanbit/cassandra,mashuai/Cassandra-Research,LatencyUtils/cassandra-stress2,darach/cassandra,spodkowinski/cassandra,jsanda/cassandra,codefollower/Cassandra-Research,JeremiahDJordan/cassandra,snazy/cassandra,adelapena/cassandra,modempachev4/kassandra,vaibhi9/cassandra,kgreav/cassandra,nakomis/cassandra,mashuai/Cassandra-Research,yonglehou/cassandra,pthomaid/cassandra,tjake/cassandra,sedulam/CASSANDRA-12201,ibmsoe/cassandra,aarushi12002/cassandra,Instagram/cassandra,yhnishi/cassandra,instaclustr/cassandra,nitsanw/cassandra,mike-tr-adamson/cassandra,juiceblender/cassandra,EnigmaCurry/cassandra,michaelmior/cassandra,Stratio/stratio-cassandra,rogerchina/cassandra,sayanh/ViewMaintenanceCassandra,clohfink/cassandra,mheffner/cassandra-1,mgmuscari/cassandra-cdh4,jsanda/cassandra,spodkowinski/cassandra,mkjellman/cassandra,pauloricardomg/cassandra,Bj0rnen/cassandra,heiko-braun/cassandra,RyanMagnusson/cassandra,Stratio/cassandra,boneill42/cassandra,Instagram/cassandra,sriki77/cassandra,asias/cassandra,taigetco/cassandra_read,strapdata/cassandra,sivikt/cassandra,sayanh/ViewMaintenanceSupport,sharvanath/cassandra,scaledata/cassandra,weideng1/cassandra,regispl/cassandra,nakomis/cassandra,aarushi12002/cassandra,aweisberg/cassandra,jeffjirsa/cassandra,jeromatron/cassandra,Stratio/stratio-cassandra,lalithsuresh/cassandra-c3,nvoron23/cassandra,bcoverston/cassandra,sharvanath/cassandra,weipinghe/cassandra,nutbunnies/cassandra,exoscale/cassandra,sbtourist/cassandra,belliottsmith/cassandra,whitepages/cassandra,blambov/cassandra,pcn/cassandra-1,yangzhe1991/cassandra,apache/cassandra,knifewine/cassandra,beobal/cassandra,fengshao0907/Cassandra-Research,aboudreault/cassandra,hengxin/cassandra,DavidHerzogTU-Berlin/cassandraToRun,phact/cassandra,belliottsmith/cassandra,chbatey/cassandra-1,hhorii/cassandra,shawnkumar/cstargraph,krummas/cassandra,taigetco/cassandra_read,michaelsembwever/cassandra,pauloricardomg/cassandra,ben-manes/cassandra,whitepages/cassandra,matthewtt/cassandra_read,pauloricardomg/cassandra,hengxin/cassandra,modempachev4/kassandra,aboudreault/cassandra,carlyeks/cassandra,tjake/cassandra,jrwest/cassandra,Imran-C/cassandra,beobal/cassandra,shawnkumar/cstargraph,fengshao0907/cassandra-1,nakomis/cassandra,guard163/cassandra,caidongyun/cassandra,Imran-C/cassandra,ptnapoleon/cassandra,mike-tr-adamson/cassandra,Stratio/stratio-cassandra,iamaleksey/cassandra,scylladb/scylla-tools-java,ptnapoleon/cassandra,Instagram/cassandra,DavidHerzogTU-Berlin/cassandra,codefollower/Cassandra-Research,bdeggleston/cassandra,pallavi510/cassandra,qinjin/mdtc-cassandra,joesiewert/cassandra,likaiwalkman/cassandra,JeremiahDJordan/cassandra,wreda/cassandra,mt0803/cassandra,miguel0afd/cassandra-cqlMod,project-zerus/cassandra,nitsanw/cassandra,yukim/cassandra,wreda/cassandra,pallavi510/cassandra,AtwooTM/cassandra,MasahikoSawada/cassandra,spodkowinski/cassandra,sriki77/cassandra,aureagle/cassandra,yangzhe1991/cassandra,mshuler/cassandra,dongjiaqiang/cassandra,ptuckey/cassandra,blerer/cassandra,aarushi12002/cassandra,blambov/cassandra,exoscale/cassandra,DikangGu/cassandra,xiongzheng/Cassandra-Research,thobbs/cassandra,ollie314/cassandra,taigetco/cassandra_read,a-buck/cassandra,project-zerus/cassandra,qinjin/mdtc-cassandra,fengshao0907/Cassandra-Research,pofallon/cassandra,weideng1/cassandra,miguel0afd/cassandra-cqlMod,iburmistrov/Cassandra,tjake/cassandra,mgmuscari/cassandra-cdh4,adelapena/cassandra,scylladb/scylla-tools-java,krummas/cassandra,thobbs/cassandra,miguel0afd/cassandra-cqlMod,iburmistrov/Cassandra,ifesdjeen/cassandra,iburmistrov/Cassandra,dongjiaqiang/cassandra,bdeggleston/cassandra,aureagle/cassandra,pkdevbox/cassandra,rogerchina/cassandra,joesiewert/cassandra,darach/cassandra,Jaumo/cassandra,blerer/cassandra,rmarchei/cassandra,WorksApplications/cassandra,rackerlabs/cloudmetrics-cassandra,chaordic/cassandra,iamaleksey/cassandra,regispl/cassandra,asias/cassandra,GabrielNicolasAvellaneda/cassandra,bmel/cassandra,jrwest/cassandra,Instagram/cassandra,krummas/cassandra,sayanh/ViewMaintenanceSupport,michaelsembwever/cassandra,macintoshio/cassandra,ejankan/cassandra,sharvanath/cassandra,newrelic-forks/cassandra,instaclustr/cassandra,mkjellman/cassandra,cooldoger/cassandra,regispl/cassandra,knifewine/cassandra,sivikt/cassandra,Stratio/stratio-cassandra,tjake/cassandra,heiko-braun/cassandra,Imran-C/cassandra,sluk3r/cassandra,tommystendahl/cassandra,bpupadhyaya/cassandra,kgreav/cassandra,xiongzheng/Cassandra-Research,knifewine/cassandra,mt0803/cassandra,apache/cassandra,DavidHerzogTU-Berlin/cassandraToRun,aweisberg/cassandra,pcn/cassandra-1,emolsson/cassandra,ibmsoe/cassandra,AtwooTM/cassandra,guanxi55nba/key-value-store,ben-manes/cassandra,exoscale/cassandra,aboudreault/cassandra,gdusbabek/cassandra,AtwooTM/cassandra,yonglehou/cassandra,yanbit/cassandra,ollie314/cassandra,EnigmaCurry/cassandra,weipinghe/cassandra,kgreav/cassandra,dprguiuc/Cassandra-Wasef,instaclustr/cassandra,vaibhi9/cassandra,dkua/cassandra,michaelsembwever/cassandra,wreda/cassandra,kangkot/stratio-cassandra,nlalevee/cassandra,jkni/cassandra,likaiwalkman/cassandra,macintoshio/cassandra,driftx/cassandra,cooldoger/cassandra,GabrielNicolasAvellaneda/cassandra,leomrocha/cassandra,bmel/cassandra,Jaumo/cassandra,lalithsuresh/cassandra-c3,mike-tr-adamson/cassandra,caidongyun/cassandra,ifesdjeen/cassandra,spodkowinski/cassandra,rdio/cassandra,dkua/cassandra,nitsanw/cassandra,yukim/cassandra,ifesdjeen/cassandra,asias/cassandra,strapdata/cassandra,pofallon/cassandra,juiceblender/cassandra,sivikt/cassandra,jkni/cassandra,DavidHerzogTU-Berlin/cassandraToRun,yonglehou/cassandra,nvoron23/cassandra,tongjixianing/projects,dkua/cassandra,sluk3r/cassandra,gdusbabek/cassandra,michaelmior/cassandra,hhorii/cassandra,xiongzheng/Cassandra-Research,guanxi55nba/db-improvement,christian-esken/cassandra,szhou1234/cassandra,adelapena/cassandra,pofallon/cassandra,belliottsmith/cassandra,leomrocha/cassandra,juiceblender/cassandra,scylladb/scylla-tools-java,thelastpickle/cassandra,emolsson/cassandra,thelastpickle/cassandra,michaelmior/cassandra,kgreav/cassandra,DICL/cassandra,rdio/cassandra,kangkot/stratio-cassandra,pthomaid/cassandra,jasonwee/cassandra,LatencyUtils/cassandra-stress2,aureagle/cassandra,DikangGu/cassandra,pcmanus/cassandra,Bj0rnen/cassandra,driftx/cassandra,heiko-braun/cassandra,dprguiuc/Cassandra-Wasef,sayanh/ViewMaintenanceCassandra,bdeggleston/cassandra,scaledata/cassandra,josh-mckenzie/cassandra,fengshao0907/cassandra-1,thobbs/cassandra,belliottsmith/cassandra,jbellis/cassandra,matthewtt/cassandra_read,nutbunnies/cassandra,mambocab/cassandra,jasobrown/cassandra,pcmanus/cassandra,ptnapoleon/cassandra,newrelic-forks/cassandra,guanxi55nba/key-value-store,pthomaid/cassandra,christian-esken/cassandra,Bj0rnen/cassandra,thelastpickle/cassandra,nvoron23/cassandra,mt0803/cassandra,EnigmaCurry/cassandra,jeromatron/cassandra,leomrocha/cassandra,jsanda/cassandra,kangkot/stratio-cassandra,tommystendahl/cassandra,beobal/cassandra,likaiwalkman/cassandra,mike-tr-adamson/cassandra,strapdata/cassandra,mshuler/cassandra,ollie314/cassandra,vramaswamy456/cassandra,josh-mckenzie/cassandra,yukim/cassandra,Jollyplum/cassandra,kangkot/stratio-cassandra,swps/cassandra,jeromatron/cassandra,bcoverston/cassandra,MasahikoSawada/cassandra,sayanh/ViewMaintenanceCassandra,mgmuscari/cassandra-cdh4,phact/cassandra,blambov/cassandra,sriki77/cassandra,weipinghe/cassandra,boneill42/cassandra,vramaswamy456/cassandra,adejanovski/cassandra,scaledata/cassandra,a-buck/cassandra,pauloricardomg/cassandra,cooldoger/cassandra,bpupadhyaya/cassandra,yangzhe1991/cassandra,sedulam/CASSANDRA-12201,mkjellman/cassandra,shawnkumar/cstargraph,fengshao0907/Cassandra-Research,iamaleksey/cassandra,DavidHerzogTU-Berlin/cassandra,WorksApplications/cassandra,mashuai/Cassandra-Research,jasonwee/cassandra,RyanMagnusson/cassandra,rackerlabs/cloudmetrics-cassandra,szhou1234/cassandra,darach/cassandra,apache/cassandra,jasobrown/cassandra,whitepages/cassandra,ifesdjeen/cassandra,instaclustr/cassandra,yukim/cassandra,jeffjirsa/cassandra,guanxi55nba/key-value-store,WorksApplications/cassandra,mshuler/cassandra,helena/cassandra,sedulam/CASSANDRA-12201,kangkot/stratio-cassandra,Jaumo/cassandra,josh-mckenzie/cassandra,mambocab/cassandra,codefollower/Cassandra-Research,jasonwee/cassandra,bcoverston/cassandra,jasobrown/cassandra,jkni/cassandra,guanxi55nba/db-improvement,pkdevbox/cassandra,chbatey/cassandra-1,swps/cassandra,yanbit/cassandra,jrwest/cassandra,GabrielNicolasAvellaneda/cassandra,adelapena/cassandra,hengxin/cassandra,helena/cassandra,nlalevee/cassandra,bcoverston/cassandra,tommystendahl/cassandra,driftx/cassandra,nutbunnies/cassandra,adejanovski/cassandra,modempachev4/kassandra,rackerlabs/cloudmetrics-cassandra,stef1927/cassandra,caidongyun/cassandra,newrelic-forks/cassandra,scylladb/scylla-tools-java,carlyeks/cassandra,pcmanus/cassandra,mheffner/cassandra-1,bdeggleston/cassandra,chaordic/cassandra,beobal/cassandra,clohfink/cassandra,ibmsoe/cassandra,guanxi55nba/db-improvement,vaibhi9/cassandra,szhou1234/cassandra,christian-esken/cassandra,jrwest/cassandra,blerer/cassandra,swps/cassandra,szhou1234/cassandra,stef1927/cassandra,project-zerus/cassandra,qinjin/mdtc-cassandra,sbtourist/cassandra,ptuckey/cassandra,ejankan/cassandra,apache/cassandra,krummas/cassandra,rmarchei/cassandra,Stratio/cassandra,jbellis/cassandra,Stratio/cassandra,ptuckey/cassandra,snazy/cassandra,bpupadhyaya/cassandra