The commit adds capability to accept csv parameters
for network option in service create/update commands.The change
includes name,alias driver options specific to the network.
With this the following will be supported
docker service create --name web --network name=docknet,alias=web1,driver-opt=field1=value1 nginx
docker service create --name web --network docknet nginx
docker service update web --network-add name=docknet,alias=web1,driver-opt=field1=value1
docker service update web --network-rm docknet
Signed-off-by: Abhinandan Prativadi <abhi@docker.com>