Cluster: redis-trib fix: cover new case of open slot.
Cluster: redis-trib fix: cover new case of open slot.

The case is the trivial one a single node claiming the slot as
migrating, without nodes claiming it as importing.

kensou97/redis,YuanZhewei/redis,linfangrong/redis,clamoriniere1A/redis,abhiklodh/redis,janekmi/redis,mingyaaaa/redis,antirez/redis,ErikDubbelboer/redis,saisai/redis,ketor/redis,hgl888/redis,Sciumo/redis,yossigo/redis,vincent-vivian-liu/redis,csuhawk/redis,HeartSaVioR/redis,taoguan/redis,Soledad89/redis,GitHubMota/redis,cloudrain21/redis,yossigo/redis,AplayER/redis,SummonY/redis,charsyam/redis,twskipper/redis,RepmujNetsik/redis,badboy/redis,izhoujie/redis,gilala/bjredis,spinlock/redis,ituncle/redis,NBSW/redis,blackmady/redis,universsky/redis,j0hnma/szredis,clamoriniere1A/redis,roth1002/redis,neomantra/redis,ton31337/redis,simplestbest/redis,brg-liuwei/redis,Wangyao14cyy/redis,shining-yang/redis,devaos/redis,ofirluzon/redis,netroby/redis,zczhuohuo/redis,mumingv/redis,kmiku7/redis,nuxeh/redis,190235047/redis,OmarQunsul/graph-redis,badboy/redis,modulexcite/redis,rouzier/redis,jbochi/parallel_redis,ctripcorp/redis,zczhuohuo/redis,ytjiang/redis,universsky/redis,linfangrong/redis,universsky/redis,Markgorden/redis,zguangyu/redis,CodeJuan/redis,rogerchina/redis,wprice/redis,wbailey5/redis,charsyam/redis,mcanthony/redis,blackmady/redis,kmiku7/redis,GrimDerp/redis,thomasdarimont/redis,pcarrier/redis,kaushik94/redis,shreesundara/redis,Aaron1992/redis,netroby/redis,colstrom/redis,citusdata/redis,jingjidejuren/redis,tjschuck/redis,ErikDubbelboer/redis,AALEKH/redis,NBSW/redis,josiahcarlson/redis,josiahcarlson/redis,mattsta/redis,nnog/redis,wenxueliu/redis_comment,190235047/redis,charsyam/redis,pedigree/redis,gilala/redis,simplestbest/redis,mumingv/redis,dreamquster/redis,PradheepShrinivasan/redis,saisai/redis,jbochi/redis,tellapart/redis,ituncle/redis,aim-for-better/redis,jackyan/redis,hgl888/redis,oranagra/redis,brg-liuwei/redis,YuanZhewei/redis,pkdevbox/redis,ofirluzon/redis,francischan714/redis,RepmujNetsik/redis,guker/redis,h0x91b/redis,h0x91b/redis,elkingtonmcb/redis,xujunhai1991/redis,pmem/redis,Markgorden/redis,pkdevbox/redis,yybirdcf/learn-redis,taoguan/redis,NBSW/redis,rogerlz/redis,takeshineshiro/redis,takeshineshiro/redis,zczhuohuo/redis,xujunhai1991/redis,holstvoogd/redis,jackyan/redis,csuhawk/redis,pcarrier/redis,4396/redis,dayuoba/redis,Wangyao14cyy/redis,yuhc/redis-benchmark-enhanced,SyntaxStacks/redis,abhiklodh/redis,davidradunz/redis,oranagra/redis,arijitvt/redis,seppo0010/rlite-server,hornen/redis,weizijun/redis,francischan714/redis,YuanZhewei/redis,clamoriniere1A/redis,Sciumo/redis,pedigree/redis,atreeyang/redis,jackyan/redis,qiyang0221/redis,tanghaodong25/redis,csuhawk/redis,PKRoma/redis,duanx/redis,xlzhan/redis,tjschuck/redis,zhiliaoniu/redis,JoeWoo/redis,shreesundara/redis,ofirluzon/redis,francischan714/redis,kmiku7/redis,kmiku7/redis,cloudrain21/redis,elkingtonmcb/redis,dayuoba/redis,h0x91b/redis,ton31337/redis,modulexcite/redis,devaos/redis,twskipper/redis,supasate/redis,wprice/redis,valdsJohn/redis,narma/redis,cusspvz/redis,abhiklodh/redis,modulexcite/redis,MOON-CLJ/redis,SyntaxStacks/redis,ncopa/redis,xlzhan/redis,spinlock/redis,davidradunz/redis,pmem/redis,guker/redis,neomantra/redis,modulexcite/redis,gilala/hbjredis,sunheehnus/redis,seandsky/redis,idning/redis,honestme/redis,a-pavlov/redis,StevenTsai/redis,nuxeh/redis,nuxeh/redis,saisai/redis,hedisdb/hedis,aim-for-better/redis,zguangyu/redis,ton31337/redis,izhoujie/redis,kensou97/redis,cnbin/redis,cnbin/redis,narma/redis,ituncle/redis,seppo0010/rlite-server,z-fork/redis,gilala/redis,Markgorden/redis,zhiliaoniu/redis,riyan8250/redis,clamoriniere1A/redis,Sciumo/redis,Aliceljm1/redis,kaushik94/redis,alenslan/redis,narma/redis,honestme/redis,july2993/redis,AALEKH/redis,soveran/redis,francischan714/redis,ncopa/redis,rogerchina/redis,itugs/redis,mengyou0304/redis,oranagra/redis,duanx/redis,citusdata/redis,itugs/redis,xuguruogu/redis,Aliceljm1/redis,josiahcarlson/redis,thomasdarimont/redis,gilala/bjredis,janekmi/redis,josiahcarlson/redis,ncopa/redis,GrimDerp/redis,linfangrong/redis,ouyangkongtong/redis,jingjidejuren/redis,flashbuckets/redis,ofirluzon/redis,jackyan/redis,PKRoma/redis,spinlock/redis,itugs/redis,wenxueliu/redis_comment,thomasdarimont/redis,gaoxianglong/redis,rogerchina/redis,wprice/redis,GitHubMota/redis,yybirdcf/learn-redis,4396/redis,SyntaxStacks/redis,ketor/redis,j0hnma/szredis,gilala/redis,hawkchch/redis,sunheehnus/redis,mingyaaaa/redis,guker/redis,harrisonfeng/redis,j0hnma/hszredis,mgk/redis,SyntaxStacks/redis,seandsky/redis,MOON-CLJ/redis,rogerchina/redis,mverrilli/redis,sunheehnus/redis,YuraLukashik/redis,MasahikoSawada/redis,weizijun/redis,july2993/redis,YuraLukashik/redis,seandsky/redis,zhiliaoniu/redis,wbailey5/redis,badboy/redis,MasahikoSawada/redis,nuxeh/redis,soveran/redis,gilala/hbjredis,MOON-CLJ/redis,timothyohare/3rdPartySrc-redis,YongMan/redis,alenslan/redis,soloestoy/redis,timothyohare/3rdPartySrc-redis,mumingv/redis,CodeJuan/redis,Aliceljm1/redis,wenxueliu/redis_comment,pcarrier/redis,LongXQ/redis,elkingtonmcb/redis,PradheepShrinivasan/redis,kaushik94/redis,vincent-vivian-liu/redis,itugs/redis,hedisdb/hedis,wujf/redis,zhcy/redis,weizijun/redis,yybirdcf/learn-redis,j0hnma/szredis,flashbuckets/redis,wbailey5/redis,valdsJohn/redis,cnbin/redis,healerkx/redis,JoeWoo/redis,190235047/redis,mgk/redis,StevenTsai/redis,j0hnma/hszredis,GitHubMota/redis,mgk/redis,xlzhan/redis,atreeyang/redis,idning/redis,PKRoma/redis,z-fork/redis,j0hnma/hszredis,LongXQ/redis,antirez/redis,mcanthony/redis,seppo0010/redis,pedigree/redis,ErikDubbelboer/redis,yossigo/redis,tellapart/redis,neomantra/redis,yossigo/redis,programmecat/redis,wujf/redis,cloudrain21/redis,mcanthony/redis,vincent-vivian-liu/redis,wangyikai/redis,allengaller/redis,ipmobiletech/redis,rogerlz/redis,JoeWoo/redis,ytjiang/redis,taoguan/redis,weizijun/redis,kaushik94/redis,tanghaodong25/redis,roth1002/redis,davidradunz/redis,wujf/redis,netroby/redis,roth1002/redis,valdsJohn/redis,pkdevbox/redis,brg-liuwei/redis,oranagra/redis,PKRoma/redis,mverrilli/redis,wujf/redis,atreeyang/redis,AALEKH/redis,AplayER/redis,Soledad89/redis,mengzhejin/RedisStudy,jasonkying/redis,holstvoogd/redis,colstrom/redis,fengshao0907/redis,Wangyao14cyy/redis,mingyaaaa/redis,allengaller/redis,hedisdb/hedis,roth1002/redis,timothyohare/3rdPartySrc-redis,ituncle/redis,izhoujie/redis,supasate/redis,gaoxianglong/redis,dreamquster/redis,gilala/bjredis,neomantra/redis,jbochi/redis,fengshao0907/redis,xlzhan/redis,iandyh/redis,takeshineshiro/redis,ipmobiletech/redis,rogerlz/redis,nnog/redis,CodeJuan/redis,cloudrain21/redis,RepmujNetsik/redis,hgl888/redis,kensou97/redis,Soledad89/redis,NBSW/redis,seppo0010/rlite-server,wangyikai/redis,LongXQ/redis,StevenTsai/redis,charsyam/redis,ketor/redis,zhcy/redis,aim-for-better/redis,OmarQunsul/graph-redis,colstrom/redis,xujunhai1991/redis,saisai/redis,gilala/hredis,valdsJohn/redis,ErikDubbelboer/redis,qiyang0221/redis,wprice/redis,pmem/redis,HeartSaVioR/redis,antirez/redis,Markgorden/redis,tanghaodong25/redis,healerkx/redis,healerkx/redis,alenslan/redis,jasonkying/redis,rogerlz/redis,seppo0010/redis,iandyh/redis,guker/redis,4396/redis,arijitvt/redis,zhcy/redis,OmarQunsul/graph-redis,mengzhejin/RedisStudy,GitHubMota/redis,AplayER/redis,OmarQunsul/graph-redis,ofirluzon/redis,izhoujie/redis,itamarhaber/redis,AALEKH/redis,Sciumo/redis,YuraLukashik/redis,mengzhejin/RedisStudy,riyan8250/redis,supasate/redis,tellapart/redis,flashbuckets/redis,cnbin/redis,zguangyu/redis,ton31337/redis,pedigree/redis,gaoxianglong/redis,atreeyang/redis,gilala/hbjredis,Aaron1992/redis,mattsta/redis,cusspvz/redis,wbailey5/redis,zczhuohuo/redis,colstrom/redis,kensou97/redis,netroby/redis,timothyohare/3rdPartySrc-redis,YongMan/redis,gilala/hredis,ipmobiletech/redis,idning/redis,yuhc/redis-benchmark-enhanced,charsyam/redis,programmecat/redis,soloestoy/redis,harrisonfeng/redis,HeartSaVioR/redis,neomantra/redis,arijitvt/redis,shining-yang/redis,mcanthony/redis,xujunhai1991/redis,ouyangkongtong/redis,huyuezheng/redis,SummonY/redis,xuguruogu/redis,blackmady/redis,brg-liuwei/redis,riyan8250/redis,HeartSaVioR/redis,universsky/redis,healerkx/redis,SummonY/redis,j0hnma/szredis,mverrilli/redis,Wangyao14cyy/redis,PKRoma/redis,rouzier/redis,programmecat/redis,CodeJuan/redis,hawkchch/redis,hornen/redis,jbochi/redis,yybirdcf/learn-redis,zhcy/redis,nnog/redis,ctripcorp/redis,AplayER/redis,pmem/redis,GrimDerp/redis,PradheepShrinivasan/redis,programmecat/redis,arijitvt/redis,tellapart/redis,hawkchch/redis,MasahikoSawada/redis,a-pavlov/redis,simplestbest/redis,yuhc/redis-benchmark-enhanced,hgl888/redis,itamarhaber/redis,duanx/redis,YuraLukashik/redis,PradheepShrinivasan/redis,pkdevbox/redis,gaoxianglong/redis,z-fork/redis,dayuoba/redis,aim-for-better/redis,YongMan/redis,soloestoy/redis,jingjidejuren/redis,4396/redis,YongMan/redis,mengzhejin/RedisStudy,mengyou0304/redis,vincent-vivian-liu/redis,huyuezheng/redis,twskipper/redis,ouyangkongtong/redis,harrisonfeng/redis,mumingv/redis,honestme/redis,harrisonfeng/redis,ouyangkongtong/redis,soveran/redis,mengyou0304/redis,ctripcorp/redis,huyuezheng/redis,huyuezheng/redis,linfangrong/redis,gilala/hredis,seppo0010/rlite-server,hornen/redis,cusspvz/redis,yuhc/redis-benchmark-enhanced,jbochi/parallel_redis,shining-yang/redis,seppo0010/redis,ytjiang/redis,Aaron1992/redis,Aliceljm1/redis,riyan8250/redis,mgk/redis,zguangyu/redis,wenxueliu/redis_comment,iandyh/redis,qiyang0221/redis,july2993/redis,simplestbest/redis,Aaron1992/redis,shining-yang/redis,gilala/bjredis,ipmobiletech/redis,shreesundara/redis,takeshineshiro/redis,thomasdarimont/redis,jasonkying/redis,gilala/hredis,rouzier/redis,mverrilli/redis,fengshao0907/redis,z-fork/redis,iandyh/redis,allengaller/redis,pcarrier/redis,badboy/redis,seppo0010/redis,xuguruogu/redis,dreamquster/redis,tjschuck/redis,july2993/redis,supasate/redis,devaos/redis,soveran/redis,devaos/redis,wangyikai/redis,tanghaodong25/redis,ncopa/redis,hawkchch/redis,xuguruogu/redis,RepmujNetsik/redis,qiyang0221/redis,jbochi/parallel_redis,Soledad89/redis,hornen/redis,zhiliaoniu/redis,tjschuck/redis,itamarhaber/redis,nnog/redis,MasahikoSawada/redis,gilala/hbjredis,LongXQ/redis,rouzier/redis,gilala/redis,dayuoba/redis,YuanZhewei/redis,soloestoy/redis,mengyou0304/redis,a-pavlov/redis,shreesundara/redis,janekmi/redis,taoguan/redis,190235047/redis,davidradunz/redis,abhiklodh/redis,jasonkying/redis,mingyaaaa/redis,seandsky/redis,blackmady/redis,janekmi/redis,allengaller/redis,GrimDerp/redis,antirez/redis,citusdata/redis,StevenTsai/redis,cusspvz/redis,flashbuckets/redis,dreamquster/redis,SummonY/redis,twskipper/redis,ctripcorp/redis,duanx/redis,csuhawk/redis,jingjidejuren/redis,yossigo/redis,sunheehnus/redis,elkingtonmcb/redis,h0x91b/redis,honestme/redis,hedisdb/hedis,JoeWoo/redis,oranagra/redis,alenslan/redis,ytjiang/redis,itamarhaber/redis,holstvoogd/redis,spinlock/redis,mattsta/redis,wangyikai/redis,soloestoy/redis,a-pavlov/redis,idning/redis,j0hnma/hszredis,holstvoogd/redis,fengshao0907/redis,citusdata/redis