Follow #28926, fix docker save can't share layers in the tar archive.
Follow #28926, fix docker save can't share layers in the tar archive.

After https://github.com/docker/docker/pull/28926, if saving multiple images
which have common layers at same time, the common layers can't share in the tar archive
because the hash ID changes because of the Create time. The Create time is used for
pre v1.9 which treat each layer as a image and make no sense for after v1.10.
To make the hash ID consistent and keep the image save from >1.10 working properly
on pre v1.9, using a constant Create time `time.Unix(0,0)`.

Signed-off-by: Lei Jitang <9ac444d2b5df3db1f31aa1c6462ac8e9e2bde241@huawei.com>

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