add test to make sure it doesn't deadlock
add test to make sure it doesn't deadlock

Signed-off-by: Victor Vieux <5e30c7222a5138067ad5bff2f2b96878cc9b735a@gmail.com>

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