iptables: jump to DOCKER-USER first
iptables: jump to DOCKER-USER first

Fixes #1827

Signed-off-by: Jacob Wen <7568f2e94ed170d8618606da6292179f0e1b678f@oracle.com>

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