Clear cached udp connections on resolver Stop()
Clear cached udp connections on resolver Stop()

Signed-off-by: Santhosh Manohar <0806b0927a65802677e1bc58a740a42f957953d7@docker.com>

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