cluster/container: correctly name swarm tasks
cluster/container: correctly name swarm tasks

Even after a slew of PRs, this still wasn't quite right. Now, we ensure
the task name is calculared in one place in the executor, as least.

We'll have to follow this up once the `api/naming` package from SwarmKit
lands.

Signed-off-by: Stephen J Day <63efd86fa22882ae89b6027b22a36e4db1f4214d@docker.com>

KingEmet/docker,jimjag/docker,erikstmartin/docker,ffoysal/docker,noironetworks/docker,lixiaobing10051267/docker,catinthesky/docker,ibuildthecloud/docker,mikedougherty/docker,mstanleyjones/docker,crosbymichael/docker,dmcgowan/docker,laijs/moby,cyphar/docker,HideoYamauchi/docker,KarthikNayak/docker,konstruktoid/docker-1,Mokolea/docker,harche/docker,thtanaka/docker,whuwxl/docker,coreos/docker,KingEmet/docker,jameszhan/docker,raja-sami-10p/moby,danyalKhaliq10p/moby,tklauser/docker,ibuildthecloud/docker,konstruktoid/docker-1,kolyshkin/docker,amatsus/docker,catinthesky/docker,qudongfang/docker,laijs/moby,AkihiroSuda/docker,SvenDowideit/docker,vdemeester/docker,fcrisciani/docker,cpuguy83/docker,moypray/docker,erikh/docker,stevvooe/docker,Mokolea/docker,rhatdan/docker,erikstmartin/docker,msabansal/docker,pradipd/moby,gnailuy/docker,allencloud/docker,gnailuy/docker,dgageot/docker,gschaetz/moby,Mokolea/docker,moby/moby,coolljt0725/docker,kolyshkin/docker,PatrickLang/moby,prertik/docker,jlhawn/docker,gnailuy/docker,lixiaobing1/docker,flavio/docker,thtanaka/docker,pramodhkp/moby,x1022as/docker,mahak/docker,PatrickLang/moby,AkihiroSuda/docker,rancher/docker,alfred-landrum/docker,dims/docker,coolljt0725/docker,sterchelen/docker,johnstep/moby-moby,fcrisciani/docker,darrenstahlmsft/docker,sterchelen/docker,moby/moby,mikedougherty/docker,nawawi/docker,dsheets/moby,bearstech/moby,paralin/docker,JMesser81/docker,erikh/docker,msabansal/docker,shhsu/docker,michael-holzheu/docker,docker/docker,nalind/docker,jthelin/docker,KarthikNayak/docker,paralin/docker,gjaskiewicz/moby,kojiromike/docker,YuPengZTE/docker,madhanrm/docker,thaJeztah/docker,djs55/docker,konstruktoid/docker-upstream,mikebrow/docker,nawawi/docker,kolyshkin/moby,tonistiigi/docker,mahak/docker,djs55/docker,yosifkit/docker,rremer/moby,coreos/docker,kencochrane/docker,jthelin/docker,sdurrheimer/docker,lixiaobing10051267/docker,kolyshkin/moby,sdurrheimer/docker,diogomonica/docker,tianon/docker,tmp6154/docker,nalind/docker,mtesselH/docker,tklauser/docker,akira-baruah/docker,akira-baruah/docker,trebonian/docker,HideoYamauchi/docker,mstanleyjones/docker,resin-io/docker,srust/docker,kojiromike/docker,naveed-jamil-tenpearls/moby,bonczj/moby-json-file-logger,estesp/docker,mkumatag/docker,mahak/docker,mixja/docker,haveatry/docker,moul/docker,Syntaxide/docker,shishir-a412ed/docker,q384566678/docker,thtanaka/docker,unclejack/docker,flavio/docker,jimjag/docker,nalind/docker,harche/docker,cyphar/docker,scotttlin/docker,cpuguy83/docker,KingEmet/docker,diogomonica/docker,justincormack/docker,nawawi/docker,mike1729/docker,jimjag/docker,stevvooe/docker,sterchelen/docker,Syntaxide/docker,docker/docker,moypray/docker,raja-sami-10p/moby,haveatry/docker,kencochrane/docker,yummypeng/docker,trebonian/docker,moul/docker,johnstep/moby-moby,trebonian/docker,pramodhkp/moby,tophj-ibm/docker,moby/moby,alfred-landrum/docker,noironetworks/docker,konstruktoid/docker-1,ibuildthecloud/docker,Ramzec/docker,yongtang/docker,yongtang/docker,darrenstahlmsft/moby,mike1729/docker,Ramzec/docker,q384566678/docker,dmcgowan/docker,nalind/docker,mtrmac/docker,michael-holzheu/docker,jwhonce/docker,johnstep/moby-moby,allencloud/docker,gnailuy/docker,yosifkit/docker,miminar/docker,danyalKhaliq10p/moby,xuxinkun/docker,dims/docker,pramodhkp/moby,mtrmac/docker,sarnautov/moby,jameszhan/docker,tmp6154/docker,flavio/docker,imkin/moby,xuxinkun/docker,harche/docker,qudongfang/docker,mikedougherty/docker,kolyshkin/moby,yosifkit/docker,konstruktoid/docker-upstream,raja-sami-10p/moby,tonistiigi/docker,duglin/docker,SvenDowideit/docker,ripcurld0/moby,Mokolea/docker,darrenstahlmsft/docker,justincormack/docker,jameszhan/docker,resin-io/docker,miminar/docker,tophj-ibm/moby,rancher/docker,JMesser81/docker,imkin/moby,POLJM242/docker,paralin/docker,rremer/moby,sdurrheimer/docker,prertik/docker,ColinHebert/docker,dperny/docker,whuwxl/docker,jvanz/docker,PatrickLang/moby,Syntaxide/docker,duglin/docker,ndeloof/docker,liaoqingwei/docker,endophage/docker,q384566678/docker,liaoqingwei/docker,Ramzec/docker,crosbymichael/docker,rhatdan/docker,YuPengZTE/docker,ndeloof/docker,mike1729/docker,lixiaobing1/docker,shishir-a412ed/docker,coreos/docker,catinthesky/docker,AkihiroSuda/docker,charleszheng44/moby,rancher/docker,dccurtis/docker,dgageot/docker,yosifkit/docker,ColinHebert/docker,amatsus/docker,haveatry/docker,resin-io/docker,ripcurld0/moby,estesp/docker,endophage/docker,unclejack/docker,jimjag/docker,lixiaobing1/docker,KarthikNayak/docker,prertik/docker,maxamillion/docker,cpuguy83/docker,dperny/docker,estesp/docker,kojiromike/docker,yasiramin10p/moby,gschaetz/moby,maxamillion/docker,miminar/docker,maxamillion/docker,sarnautov/moby,djs55/docker,endophage/docker,scotttlin/docker,mtrmac/docker,gschaetz/moby,tklauser/docker,x1022as/docker,paralin/docker,bearstech/moby,hqhq/moby,jlhawn/docker,whuwxl/docker,nawawi/docker,AkihiroSuda/docker,mikebrow/docker,cyphar/docker,dsheets/moby,darrenstahlmsft/moby,dmcgowan/docker,madhanrm/docker,shhsu/docker,thaJeztah/docker,yasiramin10p/moby,moby/moby,dperny/docker,erikstmartin/docker,darrenstahlmsft/moby,bearstech/moby,Ramzec/docker,laijs/docker,JMesser81/docker,lixiaobing10051267/docker,konstruktoid/docker-upstream,crosbymichael/docker,pradipd/moby,hqhq/moby,tianon/docker,amatsus/docker,pradipd/moby,danyalKhaliq10p/moby,dgageot/docker,xuxinkun/docker,docker/docker,scotttlin/docker,konstruktoid/docker-upstream,mtesselH/docker,kencochrane/docker,mtesselH/docker,moul/docker,sarnautov/moby,michael-holzheu/docker,tmp6154/docker,flavio/docker,ffoysal/docker,unclejack/docker,charleszheng44/moby,shishir-a412ed/docker,ndeloof/docker,ripcurld0/moby,coolljt0725/docker,dims/docker,gjaskiewicz/moby,yummypeng/docker,moul/docker,bonczj/moby-json-file-logger,dccurtis/docker,rhatdan/docker,mkumatag/docker,hqhq/moby,jwhonce/docker,darrenstahlmsft/docker,mstanleyjones/docker,laijs/docker,SvenDowideit/docker,noironetworks/docker,jvanz/docker,x1022as/docker,alfred-landrum/docker,naveed-jamil-tenpearls/moby,vdemeester/docker,charleszheng44/moby,laijs/moby,trebonian/docker,moypray/docker,gjaskiewicz/moby,tophj-ibm/docker,srust/docker,mkumatag/docker,yasiramin10p/moby,bearstech/moby,jvanz/docker,laijs/docker,ColinHebert/docker,stevvooe/docker,mahak/docker,jwhonce/docker,tophj-ibm/moby,dccurtis/docker,duglin/docker,imkin/moby,yongtang/docker,tophj-ibm/docker,qudongfang/docker,HideoYamauchi/docker,mikebrow/docker,yummypeng/docker,tophj-ibm/moby,liaoqingwei/docker,madhanrm/docker,srust/docker,mixja/docker,ibuildthecloud/docker,fcrisciani/docker,naveed-jamil-tenpearls/moby,cpuguy83/docker,mixja/docker,ffoysal/docker,thaJeztah/docker,thaJeztah/docker,erikh/docker,vdemeester/docker,jlhawn/docker,POLJM242/docker,dsheets/moby,justincormack/docker,allencloud/docker,shhsu/docker,ibuildthecloud/docker,tonistiigi/docker,rremer/moby,bonczj/moby-json-file-logger,YuPengZTE/docker,msabansal/docker,diogomonica/docker