hack: unmount leftover daemon root folders
hack: unmount leftover daemon root folders

Signed-off-by: Tibor Vass <3f1326dff4d85ad4ec938fb33f64575ace96db26@docker.com>

vdemeester/docker,moby/moby,AkihiroSuda/docker,SvenDowideit/docker,jvanz/docker,ibuildthecloud/docker,konstruktoid/docker-1,Mokolea/docker,moby/moby,cpuguy83/docker,moul/docker,mahak/docker,cpuguy83/docker,trebonian/docker,jthelin/docker,vdemeester/docker,docker/docker,nawawi/docker,tmp6154/docker,Mokolea/docker,kolyshkin/moby,trebonian/docker,Ramzec/docker,jimjag/docker,flavio/docker,gnailuy/docker,ibuildthecloud/docker,paralin/docker,Mokolea/docker,mahak/docker,Ramzec/docker,trebonian/docker,kojiromike/docker,yongtang/docker,docker/docker,Ramzec/docker,bearstech/moby,yosifkit/docker,vdemeester/docker,djs55/docker,nalind/docker,Mokolea/docker,nalind/docker,jthelin/docker,konstruktoid/docker-1,konstruktoid/docker-upstream,ibuildthecloud/docker,bearstech/moby,jameszhan/docker,jvanz/docker,paralin/docker,yosifkit/docker,jimjag/docker,Ramzec/docker,djs55/docker,flavio/docker,dims/docker,bearstech/moby,gnailuy/docker,yongtang/docker,ibuildthecloud/docker,nawawi/docker,ibuildthecloud/docker,docker/docker,moby/moby,konstruktoid/docker-1,djs55/docker,estesp/docker,gnailuy/docker,yongtang/docker,AkihiroSuda/docker,mahak/docker,konstruktoid/docker-upstream,jameszhan/docker,mahak/docker,nawawi/docker,bearstech/moby,cpuguy83/docker,estesp/docker,pradipd/moby,moby/moby,thaJeztah/docker,AkihiroSuda/docker,AkihiroSuda/docker,thaJeztah/docker,justincormack/docker,nalind/docker,kojiromike/docker,justincormack/docker,moul/docker,jameszhan/docker,moul/docker,flavio/docker,paralin/docker,moul/docker,trebonian/docker,gnailuy/docker,pradipd/moby,jimjag/docker,cpuguy83/docker,kojiromike/docker,flavio/docker,jvanz/docker,tmp6154/docker,estesp/docker,nawawi/docker,tmp6154/docker,pradipd/moby,dims/docker,thaJeztah/docker,yosifkit/docker,dims/docker,kolyshkin/moby,paralin/docker,SvenDowideit/docker,konstruktoid/docker-upstream,konstruktoid/docker-upstream,thaJeztah/docker,SvenDowideit/docker,kolyshkin/moby,justincormack/docker,nalind/docker,yosifkit/docker,jimjag/docker