integration: minor cleanup of docker save multi-images
integration: minor cleanup of docker save multi-images

Signed-off-by: Andrea Luzzardi <442ffe3ffbfd024afcf0b7f8b108d05bca3aae43@gmail.com>

thaJeztah/docker.github.io,beni55/swarm-1,pdevine/swarm,qianzhangxa/swarm,affo/swarm,denverdino/docker.github.io,sanscontext/docker.github.io,shubheksha/docker.github.io,troy0820/docker.github.io,phiroict/docker,qianzhangxa/swarm,shot/swarm,denverdino/denverdino.github.io,LuisBosquez/docker.github.io,linecheng/swarm,bsmr-docker/swarm,EderRoger/swarm,echupriyanov/swarm,sfsmithcha/swarm,denverdino/swarm-1,gradywang/swarm,thaJeztah/docker.github.io,phiroict/docker,everett-toews/swarm,mgoelzer/swarm,parapsyche/swarm,PeoplePerHour/libswarm,FreedomWangLi/swarm,alexisbellido/docker.github.io,rillig/docker.github.io,tangkun75/swarm,alexisbellido/docker.github.io,joaofnfernandes/docker.github.io,BSWANG/denverdino.github.io,denverdino/docker.github.io,jeffjen/swarm,CiaranCostello/swarm,ejholmes/swarm,allencloud/swarm,krystism/swarm,srikalyan/swarm,joeuo/docker.github.io,johnstep/docker.github.io,LukasBacigal/swarm,JimGalasyn/docker.github.io,shahankhatch/swarm,jeffjen/swarm,jimenez/swarm,rchicoli/swarm,cpuguy83/swarm,docker/docker.github.io,mrjana/swarm,thaJeztah/docker.github.io,CodeNow/swarm,alexisbellido/docker.github.io,denverdino/denverdino.github.io,JimGalasyn/docker.github.io,ealang/swarm,FreedomWangLi/swarm,gradywang/swarm,shubheksha/docker.github.io,unodba/swarm,denverdino/swarm,jzwlqx/denverdino.github.io,polyverse-security/swarm,errordeveloper/swarm,resouer/swarm,vlajos/swarm,mgoelzer/swarm,atlassian/swarm,docker-zh/docker.github.io,denverdino/swarm-1,denverdino/swarm,affo/swarm,iaintshine/swarm,sanscontext/docker.github.io,denverdino/denverdino.github.io,JimGalasyn/docker.github.io,dims/swarm,rillig/docker.github.io,ehazlett/swarm,LuisBosquez/docker.github.io,auzias/swarm,MHBauer/swarm,FollowMyDev/swarm,johnstep/docker.github.io,kyhavlov/swarm,bdwill/docker.github.io,NunoEdgarGub1/swarm,dnephin/swarm,zkcrescent/swarm,swarm-hooks/swarm,francisbouvier/swarm,gonkulator/swarm,linecheng/swarm,adouang/swarm,ezrasilvera/swarm,jzwlqx/denverdino.github.io,pdevine/swarm,bpradipt/swarm,jimmycmh/swarm,joeuo/docker.github.io,auzias/swarm,troy0820/docker.github.io,johnstep/docker.github.io,docker-zh/docker.github.io,danix800/docker.github.io,rav121/swarm,fugr/swarm,sanscontext/docker.github.io,docker/docker.github.io,cpuguy83/swarm,gonkulator/swarm,akerbis/armhf-swarm,LuisBosquez/docker.github.io,LukasBacigal/swarm,riuvshin/swarm,menglingwei/denverdino.github.io,doronp/swarm,bpradipt/swarm,docker/docker.github.io,gdevillele/docker.github.io,londoncalling/docker.github.io,menglingwei/denverdino.github.io,iaintshine/swarm,ch3lo/swarm,shin-/docker.github.io,kunalkushwaha/swarm,barais/swarm,pssahi/swarm,zkcrescent/swarm,mavenugo/swarm,therealbill/swarm,polyverse-security/swarm,aduermael/docker.github.io,aduermael/docker.github.io,aduermael/docker.github.io,docker/docker.github.io,shin-/docker.github.io,Aorjoa/swarm,BSWANG/denverdino.github.io,Spritekin/swarm,londoncalling/docker.github.io,parapsyche/swarm,megamsys/swarm,snrism/swarm,phiroict/docker,thaJeztah/docker.github.io,denverdino/docker.github.io,BSWANG/denverdino.github.io,rchicoli/swarm,joaofnfernandes/docker.github.io,riuvshin/swarm,sanscontext/docker.github.io,jimenez/swarm,moxiegirl/swarm,therealbill/swarm,jzwlqx/denverdino.github.io,alexisbellido/docker.github.io,krystism/swarm,joeuo/docker.github.io,denverdino/docker.github.io,tranceitionalMynd/swarm,shubheksha/docker.github.io,abronan/swarm,shin-/docker.github.io,fugr/swarm,docker/docker.github.io,rutulpatel/swarm,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,JimGalasyn/docker.github.io,liubin/swarm,danix800/docker.github.io,joeuo/docker.github.io,resouer/swarm,CiaranCostello/swarm,mrjana/swarm,liubin/swarm,joaofnfernandes/docker.github.io,ricca742/swarm,morpheyesh/swarm,doronp/swarm,rutulpatel/swarm,bdwill/docker.github.io,denverdino/denverdino.github.io,schmunk42/swarm,rajdeepd/swarm,atlassian/swarm,bdwill/docker.github.io,shubheksha/docker.github.io,srikalyan/swarm,moxiegirl/swarm,echupriyanov/swarm,gdevillele/docker.github.io,bdwill/docker.github.io,BSWANG/swarm,ezrasilvera/SwarmACLs,docker-zh/docker.github.io,raoofm/swarm,denverdino/docker.github.io,ealang/swarm,gdevillele/docker.github.io,shubheksha/docker.github.io,ezrasilvera/swarm,denverdino/denverdino.github.io,aduermael/docker.github.io,shahankhatch/swarm,jimmyxian/swarm,FollowMyDev/swarm,londoncalling/docker.github.io,joaofnfernandes/docker.github.io,LuisBosquez/docker.github.io,shot/swarm,francisbouvier/swarm,bsmr-docker/swarm,BSWANG/denverdino.github.io,phiroict/docker,docker-zh/docker.github.io,abronan/swarm,ejholmes/swarm,johnstep/docker.github.io,EderRoger/swarm,anweiss/docker.github.io,bdwill/docker.github.io,joaofnfernandes/docker.github.io,christophelec/swarm,rajdeepd/swarm,pssahi/swarm,BSWANG/swarm,u2mejc/swarm,cgvarela/swarm,shin-/docker.github.io,anweiss/docker.github.io,ezrasilvera/SwarmACLs,menglingwei/denverdino.github.io,rancher/swarm,morpheyesh/swarm,MHBauer/swarm,u2mejc/swarm,raoofm/swarm,troy0820/docker.github.io,anweiss/docker.github.io,yp-engineering/swarm,kyhavlov/swarm,dims/swarm,CodeNow/swarm,akerbis/armhf-swarm,LuisBosquez/docker.github.io,schmunk42/swarm,gdevillele/docker.github.io,NunoEdgarGub1/swarm,jay-lau/swarm,barais/swarm,jdamick/swarm,danix800/docker.github.io,troy0820/docker.github.io,mavenugo/swarm,ch3lo/swarm,alexisbellido/docker.github.io,swarm-hooks/swarm,joeuo/docker.github.io,danix800/docker.github.io,jdamick/swarm,menglingwei/denverdino.github.io,ricca742/swarm,snrism/swarm,kunalkushwaha/swarm,unodba/swarm,xFragger/swarm,sfsmithcha/swarm,sanscontext/docker.github.io,xFragger/swarm,tangkun75/swarm,phiroict/docker,tranceitionalMynd/swarm,BSWANG/denverdino.github.io,jimmycmh/swarm,megamsys/swarm,yp-engineering/swarm,jay-lau/swarm,jimmyxian/swarm,adouang/swarm,ehazlett/swarm,jzwlqx/denverdino.github.io,everett-toews/swarm,rav121/swarm,errordeveloper/swarm,allencloud/swarm,docker-zh/docker.github.io,johnstep/docker.github.io,londoncalling/docker.github.io,shin-/docker.github.io,gdevillele/docker.github.io,rancher/swarm,londoncalling/docker.github.io,menglingwei/denverdino.github.io,PeoplePerHour/libswarm,vlajos/swarm,rillig/docker.github.io,beni55/swarm-1,Aorjoa/swarm,jzwlqx/denverdino.github.io,anweiss/docker.github.io,cgvarela/swarm,anweiss/docker.github.io,dnephin/swarm,Spritekin/swarm,christophelec/swarm,rillig/docker.github.io