Fix duplicate layers in exported tar
Fix duplicate layers in exported tar

Signed-off-by: Tonis Tiigi <c2470c48b2d3312d61f94f18d3a1cd113d1915ad@gmail.com>
moby/moby,liaoqingwei/docker,danyalKhaliq10p/moby,coolljt0725/docker,alfred-landrum/docker,konstruktoid/docker-1,JMesser81/docker,xiekeyang/docker,thaJeztah/docker,jhorwit2/docker,yongtang/docker,erikstmartin/docker,amatsus/docker,shhsu/docker,mikedougherty/docker,ibuildthecloud/docker,POLJM242/docker,dccurtis/docker,jimjag/docker,trebonian/docker,Ramzec/docker,maxamillion/docker,kojiromike/docker,lixiaobing10051267/docker,gschaetz/moby,twaugh/docker,x1022as/docker,Mokolea/docker,moul/docker,HideoYamauchi/docker,prertik/docker,asbjornenge/docker,dims/docker,bluebreezecf/docker,moby/moby,moul/docker,paralin/docker,kunalkushwaha/docker,scotttlin/docker,jimjag/docker,raja-sami-10p/moby,cpuguy83/docker,mkumatag/docker,dgageot/docker,paralin/docker,laijs/moby,bearstech/moby,lixiaobing10051267/docker,darrenstahlmsft/docker,erikh/docker,cpuguy83/docker,coreos/docker,sarnautov/moby,cyphar/docker,konstruktoid/docker-upstream,xiaods/docker,splunk/docker,hqhq/moby,yasiramin10p/moby,containers/storage,srust/docker,SvenDowideit/docker,13W/docker,michelvocks/docker,catinthesky/docker,amatsus/docker,nawawi/docker,djs55/docker,ibuildthecloud/docker,yasiramin10p/moby,splunk/docker,endophage/docker,vdemeester/docker,michelvocks/docker,harche/docker,mikebrow/docker,xuxinkun/docker,scotttlin/docker,HideoYamauchi/docker,haveatry/docker,shhsu/docker,kolyshkin/moby,darrenstahlmsft/docker,mike1729/docker,naveed-jamil-tenpearls/moby,mikebrow/docker,xiaods/docker,moul/docker,portworx/docker,endophage/docker,imkin/moby,jlhawn/docker,ndeloof/docker,dgageot/docker,ajaymdesai/docker,cpuguy83/docker,dperny/docker,lixiaobing1/docker,estesp/docker,trebonian/docker,alfred-landrum/docker,twaugh/docker,alfred-landrum/docker,paralin/docker,KingEmet/docker,hqhq/moby,SvenDowideit/docker,gnailuy/docker,charleszheng44/moby,rancher/docker,mtanlee/docker,flavio/docker,dsheets/moby,brahmaroutu/docker,yp-engineering/docker,mixja/docker,pradipd/moby,dsau/docker,icaoweiwei/docker,tmp6154/docker,flavio/docker,mike1729/docker,msabansal/docker,thaJeztah/docker,brahmaroutu/docker,allencloud/docker,shhsu/docker,unclejack/docker,noironetworks/docker,kencochrane/docker,sterchelen/docker,containers/storage,amatsus/docker,justyntemme/docker,unclejack/docker,dmcgowan/docker,Mokolea/docker,flavio/docker,jlhawn/docker,noironetworks/docker,sdurrheimer/docker,sterchelen/docker,thtanaka/docker,yp-engineering/docker,eskaaren/docker,rhatdan/storage,trebonian/docker,moypray/docker,mikedougherty/docker,xiekeyang/docker,erikstmartin/docker,rremer/moby,catinthesky/docker,coolljt0725/docker,diogomonica/docker,dccurtis/docker,tophj-ibm/moby,tianon/docker,hypriot/docker,gnailuy/docker,pramodhkp/moby,ibuildthecloud/docker,q384566678/docker,JMesser81/docker,pramodhkp/moby,djs55/docker,dongjoon-hyun/docker,erikh/docker,msabansal/docker,mohmost12/docker,raja-sami-10p/moby,ibuildthecloud/docker,mtesselH/docker,pradipd/moby,ColinHebert/docker,ColinHebert/docker,mahak/docker,kojiromike/docker,liaoqingwei/docker,KarthikNayak/docker,ibuildthecloud/docker,13W/docker,estesp/docker,twaugh/docker,justincormack/docker,tagomoris/docker,johnstep/moby-moby,gschaetz/moby,ajaymdesai/docker,sterchelen/docker,fcrisciani/docker,bonczj/moby-json-file-logger,justincormack/docker,Syntaxide/docker,michael-holzheu/docker,maxamillion/docker,AkihiroSuda/docker,dims/docker,imkin/moby,jlebon/docker,nawawi/docker,docker/docker,thtanaka/docker,laijs/docker,hypriot/docker,konstruktoid/docker-1,bearstech/moby,michael-holzheu/docker,SvenDowideit/docker,xiaods/docker,estesp/docker,laijs/docker,bearstech/moby,gjaskiewicz/moby,jwhonce/docker,laijs/docker,bearstech/moby,dims/docker,gnailuy/docker,KarthikNayak/docker,eskaaren/docker,vdemeester/docker,AkihiroSuda/docker,thaJeztah/docker,KarthikNayak/docker,sdurrheimer/docker,johnstep/moby-moby,zhuguihua/docker,abhinavdahiya/docker,ripcurld0/moby,dmcgowan/docker,nawawi/docker,nalind/docker,naveed-jamil-tenpearls/moby,kolyshkin/docker,miminar/docker,resin-io/docker,sfsmithcha/docker,mtrmac/docker,justyntemme/docker,rhatdan/storage,resin-io/docker,miminar/docker,mohmost12/docker,containers/storage,johnstep/moby-moby,dperny/docker,jameszhan/docker,jlebon/docker,whuwxl/docker,mohmost12/docker,konstruktoid/docker-upstream,ffoysal/docker,sdurrheimer/docker,jameszhan/docker,Ramzec/docker,paralin/docker,mstanleyjones/docker,13W/docker,imkin/moby,13W/docker,tmp6154/docker,tianon/docker,resin-io/docker,cloudflare/docker,mahak/docker,madhanrm/docker,charleszheng44/moby,afein/docker,tklauser/docker,jlhawn/docker,xuxinkun/docker,miminar/docker,yosifkit/docker,scotttlin/docker,stevvooe/docker,Ramzec/docker,eskaaren/docker,gjaskiewicz/moby,bluebreezecf/docker,docker/docker,jhorwit2/docker,shishir-a412ed/docker,lixiaobing1/docker,tagomoris/docker,asbjornenge/docker,thtanaka/docker,gnailuy/docker,dsau/docker,darrenstahlmsft/moby,yongtang/docker,nalind/docker,rancher/docker,JMesser81/docker,michael-holzheu/docker,Mokolea/docker,konstruktoid/docker-upstream,bonczj/moby-json-file-logger,AkihiroSuda/docker,jimjag/docker,liaoqingwei/docker,laijs/moby,hypriot/docker,michelvocks/docker,tophj-ibm/docker,lixiaobing1/docker,jthelin/docker,dmcgowan/docker,akira-baruah/docker,Mokolea/docker,afein/docker,mixja/docker,dccurtis/docker,yasiramin10p/moby,rhatdan/docker,jwhonce/docker,AkihiroSuda/docker,mtanlee/docker,maxamillion/docker,Syntaxide/docker,allencloud/docker,bluebreezecf/docker,mixja/docker,yummypeng/docker,charleszheng44/moby,q384566678/docker,zhuguihua/docker,darrenstahlmsft/docker,KingEmet/docker,danyalKhaliq10p/moby,djs55/docker,danyalKhaliq10p/moby,mikebrow/docker,ffoysal/docker,cyphar/docker,pradipd/moby,projectatomic/docker,tklauser/docker,darrenstahlmsft/moby,bonczj/moby-json-file-logger,gjaskiewicz/moby,ripcurld0/moby,tklauser/docker,kencochrane/docker,tonistiigi/docker,ajaymdesai/docker,dsheets/moby,stevvooe/docker,vdemeester/docker,mtrmac/docker,rremer/moby,raja-sami-10p/moby,x1022as/docker,mtesselH/docker,yummypeng/docker,icaoweiwei/docker,crosbymichael/docker,mtrmac/docker,lixiaobing10051267/docker,stevvooe/docker,kunalkushwaha/docker,duglin/docker,darrenstahlmsft/moby,diogomonica/docker,erikh/docker,coolljt0725/docker,madhanrm/docker,moul/docker,Ramzec/docker,kojiromike/docker,jwhonce/docker,ColinHebert/docker,xiekeyang/docker,endophage/docker,YuPengZTE/docker,duglin/docker,allencloud/docker,mahak/docker,jameszhan/docker,mkumatag/docker,sarnautov/moby,mstanleyjones/docker,kolyshkin/docker,mkumatag/docker,ndeloof/docker,haveatry/docker,noironetworks/docker,jvanz/docker,srust/docker,tophj-ibm/moby,docker/docker,srust/docker,mike1729/docker,portworx/docker,afein/docker,yosifkit/docker,icaoweiwei/docker,cloudflare/docker,kolyshkin/moby,yosifkit/docker,moypray/docker,catinthesky/docker,akira-baruah/docker,xuxinkun/docker,nalind/docker,dsau/docker,mtesselH/docker,fcrisciani/docker,Syntaxide/docker,HuKeping/docker,nalind/docker,justyntemme/docker,tophj-ibm/docker,qudongfang/docker,YuPengZTE/docker,konstruktoid/docker-upstream,HuKeping/docker,jimjag/docker,nawawi/docker,portworx/docker,jthelin/docker,dsheets/moby,HideoYamauchi/docker,harche/docker,coreos/docker,tophj-ibm/docker,PatrickLang/moby,rhatdan/docker,shishir-a412ed/docker,qudongfang/docker,justincormack/docker,pramodhkp/moby,moby/moby,YuPengZTE/docker,shishir-a412ed/docker,abhinavdahiya/docker,tonistiigi/docker,mtanlee/docker,abhinavdahiya/docker,ripcurld0/moby,madhanrm/docker,rhatdan/docker,whuwxl/docker,dgageot/docker,tmp6154/docker,rremer/moby,KingEmet/docker,dperny/docker,brahmaroutu/docker,qudongfang/docker,konstruktoid/docker-1,HuKeping/docker,dongjoon-hyun/docker,ndeloof/docker,kunalkushwaha/docker,jlebon/docker,whuwxl/docker,POLJM242/docker,fcrisciani/docker,flavio/docker,cpuguy83/docker,unclejack/docker,trebonian/docker,zhuguihua/docker,q384566678/docker,jvanz/docker,moypray/docker,mahak/docker,cloudflare/docker,haveatry/docker,rhatdan/storage,dongjoon-hyun/docker,yp-engineering/docker,projectatomic/docker,harche/docker,cyphar/docker,sfsmithcha/docker,crosbymichael/docker,prertik/docker,x1022as/docker,kencochrane/docker,yummypeng/docker,yongtang/docker,ffoysal/docker,coreos/docker,erikstmartin/docker,projectatomic/docker,mikedougherty/docker,hqhq/moby,sarnautov/moby,PatrickLang/moby,duglin/docker,prertik/docker,13W/docker,laijs/moby,tonistiigi/docker,jhorwit2/docker,jvanz/docker,diogomonica/docker,tagomoris/docker,rancher/docker,yosifkit/docker,mstanleyjones/docker,gschaetz/moby,splunk/docker,asbjornenge/docker,PatrickLang/moby,tophj-ibm/moby,crosbymichael/docker,msabansal/docker,naveed-jamil-tenpearls/moby,sfsmithcha/docker,moby/moby,kolyshkin/moby,thaJeztah/docker