Fixing concurrent map access
Fixing concurrent map access

This commit fixes panic due to concurrent map access

Signed-off-by: Abhinandan Prativadi <6b8f12da63e0791f9a1397d0839e407f10b8af40@docker.com>

abhi/libnetwork,abhi/libnetwork,kolyshkin/libnetwork,vdemeester/libnetwork,mahak/libnetwork,medallia/libnetwork,medallia/libnetwork,vdemeester/libnetwork,docker/libnetwork,kolyshkin/libnetwork,docker/libnetwork,abhi/libnetwork,mahak/libnetwork,medallia/libnetwork,kolyshkin/libnetwork,docker/libnetwork,vdemeester/libnetwork,mahak/libnetwork