Avoid nil pointer dereference in (*Cluster).createContainer
Avoid nil pointer dereference in (*Cluster).createContainer

Swarm.Create car return nil,nil when refresh fails
due to network hiccup

Signed-off-by: Mariusz Borsa <8f607f4a90398cc1a16533ebb9b853d5e116285d@polyverse.io>

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