Bridge driver needs to store the network config internal flag
Bridge driver needs to store the network config internal flag

- otherwise after daemon reload, the network is no longer internal

Signed-off-by: Alessandro Boch <5bd2eb5b6f60921d9a2b9cb6a0a86bb947f3d361@docker.com>

sainath14/libnetwork,mahak/libnetwork,msabansal/libnetwork,curtiszimmerman/libnetwork,WeiZhang555/libnetwork,medallia/libnetwork,abhi/libnetwork,mYmNeo/libnetwork,mbanikazemi/libnetwork,kolyshkin/libnetwork,fcrisciani/libnetwork,mahak/libnetwork,mbanikazemi/libnetwork,jmzwcn/libnetwork,coolljt0725/libnetwork,tmakita/libnetwork,amitkris/libnetwork,sainath14/libnetwork,medallia/libnetwork,allencloud/libnetwork,msabansal/libnetwork,kolyshkin/libnetwork,jimmycmh/libnetwork,mahak/libnetwork,vdemeester/libnetwork,jmzwcn/libnetwork,cpuguy83/libnetwork,mYmNeo/libnetwork,abhi/libnetwork,coolljt0725/libnetwork,allencloud/libnetwork,mavenugo/libnetwork,pyakpyak/libnetwork,WeiZhang555/libnetwork,tmakita/libnetwork,pyakpyak/libnetwork,medallia/libnetwork,fcrisciani/libnetwork,docker/libnetwork,curtiszimmerman/libnetwork,jimmycmh/libnetwork,vdemeester/libnetwork,YujiOshima/libnetwork,YujiOshima/libnetwork,docker/libnetwork,mavenugo/libnetwork,aboch/libnetwork_new,ityangchen/libnetwork,amitkris/libnetwork,docker/libnetwork,abhi/libnetwork,ityangchen/libnetwork,aboch/libnetwork_new,vdemeester/libnetwork,kolyshkin/libnetwork,cpuguy83/libnetwork