db/db_test.cc: reduce scope of some variables
db/db_test.cc: reduce scope of some variables

Signed-off-by: Danny Al-Gaaf <473e39ac77cf392f0dd9bacde8409de76c14d006@bisect.de>

hobinyoon/rocksdb,ylong/rocksdb,amyvmiwei/rocksdb,wenduo/rocksdb,biddyweb/rocksdb,facebook/rocksdb,NickCis/rocksdb,rDSN-Projects/rocksdb.replicated,hobinyoon/rocksdb,temicai/rocksdb,OverlordQ/rocksdb,zhangpng/rocksdb,wenduo/rocksdb,NickCis/rocksdb,siddhartharay007/rocksdb,skunkwerks/rocksdb,alihalabyah/rocksdb,ryneli/rocksdb,makelivedotnet/rocksdb,zhangpng/rocksdb,rDSN-Projects/rocksdb.replicated,SunguckLee/RocksDB,makelivedotnet/rocksdb,wlqGit/rocksdb,Vaisman/rocksdb,mbarbon/rocksdb,SunguckLee/RocksDB,siddhartharay007/rocksdb,wenduo/rocksdb,OverlordQ/rocksdb,wlqGit/rocksdb,Vaisman/rocksdb,rDSN-Projects/rocksdb.replicated,mbarbon/rocksdb,vmx/rocksdb,tizzybec/rocksdb,wlqGit/rocksdb,caijieming-baidu/rocksdb,fengshao0907/rocksdb,JohnPJenkins/rocksdb,JoeWoo/rocksdb,wat-ze-hex/rocksdb,temicai/rocksdb,norton/rocksdb,vashstorm/rocksdb,amyvmiwei/rocksdb,wlqGit/rocksdb,flabby/rocksdb,IMCG/RcoksDB,hobinyoon/rocksdb,virtdb/rocksdb,OverlordQ/rocksdb,flabby/rocksdb,jalexanderqed/rocksdb,wskplho/rocksdb,siddhartharay007/rocksdb,caijieming-baidu/rocksdb,fengshao0907/rocksdb,JackLian/rocksdb,alihalabyah/rocksdb,bbiao/rocksdb,luckywhu/rocksdb,norton/rocksdb,jalexanderqed/rocksdb,vashstorm/rocksdb,wskplho/rocksdb,jalexanderqed/rocksdb,RyanTech/rocksdb,vmx/rocksdb,flabby/rocksdb,ylong/rocksdb,makelivedotnet/rocksdb,tsheasha/rocksdb,wenduo/rocksdb,amyvmiwei/rocksdb,JackLian/rocksdb,sorphi/rocksdb,JohnPJenkins/rocksdb,dkorolev/rocksdb,sorphi/rocksdb,vmx/rocksdb,dkorolev/rocksdb,mbarbon/rocksdb,amyvmiwei/rocksdb,norton/rocksdb,vmx/rocksdb,caijieming-baidu/rocksdb,OverlordQ/rocksdb,Applied-Duality/rocksdb,hobinyoon/rocksdb,Andymic/rocksdb,Vaisman/rocksdb,dkorolev/rocksdb,hobinyoon/rocksdb,anagav/rocksdb,biddyweb/rocksdb,lgscofield/rocksdb,hobinyoon/rocksdb,bbiao/rocksdb,temicai/rocksdb,kaschaeffer/rocksdb,virtdb/rocksdb,vashstorm/rocksdb,RyanTech/rocksdb,alihalabyah/rocksdb,ylong/rocksdb,JohnPJenkins/rocksdb,wat-ze-hex/rocksdb,JohnPJenkins/rocksdb,Applied-Duality/rocksdb,ryneli/rocksdb,geraldoandradee/rocksdb,facebook/rocksdb,geraldoandradee/rocksdb,Andymic/rocksdb,JoeWoo/rocksdb,caijieming-baidu/rocksdb,fengshao0907/rocksdb,biddyweb/rocksdb,jalexanderqed/rocksdb,biddyweb/rocksdb,NickCis/rocksdb,norton/rocksdb,bbiao/rocksdb,fengshao0907/rocksdb,dkorolev/rocksdb,dkorolev/rocksdb,wlqGit/rocksdb,amyvmiwei/rocksdb,lgscofield/rocksdb,biddyweb/rocksdb,OverlordQ/rocksdb,luckywhu/rocksdb,vashstorm/rocksdb,skunkwerks/rocksdb,alihalabyah/rocksdb,IMCG/RcoksDB,JoeWoo/rocksdb,JackLian/rocksdb,jalexanderqed/rocksdb,skunkwerks/rocksdb,geraldoandradee/rocksdb,biddyweb/rocksdb,geraldoandradee/rocksdb,makelivedotnet/rocksdb,skunkwerks/rocksdb,ryneli/rocksdb,flabby/rocksdb,temicai/rocksdb,OverlordQ/rocksdb,vmx/rocksdb,lgscofield/rocksdb,norton/rocksdb,caijieming-baidu/rocksdb,Applied-Duality/rocksdb,amyvmiwei/rocksdb,rDSN-Projects/rocksdb.replicated,IMCG/RcoksDB,IMCG/RcoksDB,vmx/rocksdb,SunguckLee/RocksDB,luckywhu/rocksdb,sorphi/rocksdb,JoeWoo/rocksdb,kaschaeffer/rocksdb,anagav/rocksdb,vashstorm/rocksdb,JackLian/rocksdb,facebook/rocksdb,Vaisman/rocksdb,mbarbon/rocksdb,amyvmiwei/rocksdb,caijieming-baidu/rocksdb,rDSN-Projects/rocksdb.replicated,rDSN-Projects/rocksdb.replicated,alihalabyah/rocksdb,IMCG/RcoksDB,caijieming-baidu/rocksdb,siddhartharay007/rocksdb,Andymic/rocksdb,JoeWoo/rocksdb,NickCis/rocksdb,wlqGit/rocksdb,geraldoandradee/rocksdb,Andymic/rocksdb,RyanTech/rocksdb,luckywhu/rocksdb,skunkwerks/rocksdb,siddhartharay007/rocksdb,sorphi/rocksdb,Andymic/rocksdb,JoeWoo/rocksdb,vmx/rocksdb,Applied-Duality/rocksdb,flabby/rocksdb,wat-ze-hex/rocksdb,ylong/rocksdb,RyanTech/rocksdb,skunkwerks/rocksdb,jalexanderqed/rocksdb,Andymic/rocksdb,wskplho/rocksdb,zhangpng/rocksdb,wat-ze-hex/rocksdb,NickCis/rocksdb,flabby/rocksdb,geraldoandradee/rocksdb,SunguckLee/RocksDB,alihalabyah/rocksdb,zhangpng/rocksdb,virtdb/rocksdb,tsheasha/rocksdb,Andymic/rocksdb,JoeWoo/rocksdb,makelivedotnet/rocksdb,norton/rocksdb,anagav/rocksdb,wat-ze-hex/rocksdb,Applied-Duality/rocksdb,wat-ze-hex/rocksdb,Applied-Duality/rocksdb,NickCis/rocksdb,Vaisman/rocksdb,mbarbon/rocksdb,luckywhu/rocksdb,anagav/rocksdb,lgscofield/rocksdb,bbiao/rocksdb,tsheasha/rocksdb,JackLian/rocksdb,wskplho/rocksdb,SunguckLee/RocksDB,hobinyoon/rocksdb,norton/rocksdb,JohnPJenkins/rocksdb,vashstorm/rocksdb,kaschaeffer/rocksdb,kaschaeffer/rocksdb,Vaisman/rocksdb,lgscofield/rocksdb,temicai/rocksdb,kaschaeffer/rocksdb,tizzybec/rocksdb,SunguckLee/RocksDB,dkorolev/rocksdb,ylong/rocksdb,JackLian/rocksdb,zhangpng/rocksdb,virtdb/rocksdb,makelivedotnet/rocksdb,RyanTech/rocksdb,biddyweb/rocksdb,vashstorm/rocksdb,kaschaeffer/rocksdb,alihalabyah/rocksdb,virtdb/rocksdb,norton/rocksdb,vmx/rocksdb,tizzybec/rocksdb,ylong/rocksdb,temicai/rocksdb,rDSN-Projects/rocksdb.replicated,temicai/rocksdb,facebook/rocksdb,jalexanderqed/rocksdb,luckywhu/rocksdb,tsheasha/rocksdb,anagav/rocksdb,siddhartharay007/rocksdb,RyanTech/rocksdb,makelivedotnet/rocksdb,wskplho/rocksdb,JackLian/rocksdb,SunguckLee/RocksDB,Vaisman/rocksdb,ryneli/rocksdb,fengshao0907/rocksdb,kaschaeffer/rocksdb,sorphi/rocksdb,tizzybec/rocksdb,wskplho/rocksdb,wlqGit/rocksdb,wenduo/rocksdb,bbiao/rocksdb,virtdb/rocksdb,wskplho/rocksdb,tsheasha/rocksdb,sorphi/rocksdb,lgscofield/rocksdb,skunkwerks/rocksdb,Applied-Duality/rocksdb,SunguckLee/RocksDB,ylong/rocksdb,siddhartharay007/rocksdb,JohnPJenkins/rocksdb,hobinyoon/rocksdb,IMCG/RcoksDB,OverlordQ/rocksdb,virtdb/rocksdb,wenduo/rocksdb,tizzybec/rocksdb,bbiao/rocksdb,facebook/rocksdb,JohnPJenkins/rocksdb,dkorolev/rocksdb,tsheasha/rocksdb,lgscofield/rocksdb,ryneli/rocksdb,ryneli/rocksdb,geraldoandradee/rocksdb,wat-ze-hex/rocksdb,IMCG/RcoksDB,fengshao0907/rocksdb,zhangpng/rocksdb,bbiao/rocksdb,facebook/rocksdb,wenduo/rocksdb,RyanTech/rocksdb,tizzybec/rocksdb,mbarbon/rocksdb,wenduo/rocksdb,flabby/rocksdb,bbiao/rocksdb,tsheasha/rocksdb,zhangpng/rocksdb,facebook/rocksdb,mbarbon/rocksdb,ryneli/rocksdb,wat-ze-hex/rocksdb,Andymic/rocksdb,luckywhu/rocksdb,facebook/rocksdb,tizzybec/rocksdb,anagav/rocksdb,tsheasha/rocksdb,NickCis/rocksdb,anagav/rocksdb,sorphi/rocksdb,fengshao0907/rocksdb