Adding error log if peerAdd fails
Adding error log if peerAdd fails

Signed-off-by: Madhu Venugopal <d22477479bbf55ba62bd822f4112c80f292c7805@docker.com>

docker/libnetwork,medallia/libnetwork,mahak/libnetwork,docker/libnetwork,medallia/libnetwork,mahak/libnetwork,mahak/libnetwork,medallia/libnetwork,docker/libnetwork