integration/internal/container: fix a goroutine leak bug by adding 1 buffer
integration/internal/container: fix a goroutine leak bug by adding 1 buffer

Signed-off-by: Ziheng Liu <f7f149e5a659fc13c80c604a2bf83d2463599785@gmail.com>

jameszhan/docker,AkihiroSuda/docker,vdemeester/docker,gnailuy/docker,jimjag/docker,justincormack/docker,yosifkit/docker,kojiromike/docker,bearstech/moby,jthelin/docker,yosifkit/docker,SvenDowideit/docker,Ramzec/docker,flavio/docker,jimjag/docker,paralin/docker,konstruktoid/docker-upstream,jvanz/docker,nalind/docker,moul/docker,dims/docker,flavio/docker,docker/docker,cpuguy83/docker,yosifkit/docker,konstruktoid/docker-upstream,trebonian/docker,thaJeztah/docker,ibuildthecloud/docker,ibuildthecloud/docker,estesp/docker,thaJeztah/docker,moul/docker,konstruktoid/docker-upstream,docker/docker,AkihiroSuda/docker,nawawi/docker,trebonian/docker,djs55/docker,konstruktoid/docker-1,AkihiroSuda/docker,AkihiroSuda/docker,Mokolea/docker,jimjag/docker,gnailuy/docker,bearstech/moby,Mokolea/docker,konstruktoid/docker-1,cpuguy83/docker,nawawi/docker,nawawi/docker,kojiromike/docker,cpuguy83/docker,nawawi/docker,dims/docker,moby/moby,estesp/docker,justincormack/docker,Mokolea/docker,nalind/docker,ibuildthecloud/docker,trebonian/docker,konstruktoid/docker-1,djs55/docker,Mokolea/docker,jvanz/docker,mahak/docker,nalind/docker,pradipd/moby,Ramzec/docker,jthelin/docker,gnailuy/docker,jvanz/docker,konstruktoid/docker-upstream,yosifkit/docker,paralin/docker,Ramzec/docker,djs55/docker,gnailuy/docker,moby/moby,bearstech/moby,Ramzec/docker,justincormack/docker,mahak/docker,trebonian/docker,kojiromike/docker,cpuguy83/docker,vdemeester/docker,moby/moby,pradipd/moby,jimjag/docker,paralin/docker,SvenDowideit/docker,jameszhan/docker,moul/docker,moby/moby,SvenDowideit/docker,flavio/docker,dims/docker,mahak/docker,mahak/docker,bearstech/moby,pradipd/moby,paralin/docker,thaJeztah/docker,nalind/docker,flavio/docker,docker/docker,estesp/docker,jameszhan/docker,vdemeester/docker,thaJeztah/docker,ibuildthecloud/docker,ibuildthecloud/docker,moul/docker