Expose secondary indexes to cfhistograms. Patch by brandonwilliams, reviewed by Nick Bailey for CASSANDRA-4063
Expose secondary indexes to cfhistograms.
Patch by brandonwilliams, reviewed by Nick Bailey for CASSANDRA-4063

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