rm_test: fix goroutine leak
rm_test: fix goroutine leak

Signed-off-by: Gaurav Singh <8968a526fc7a1cdc1e19b8d2aa18b75f407d6450@gmail.com>

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