Add support docker networking

[abhas]

The container definition should allow one to define a net option to specify the network configuration for the container. This would be equivalent to providing the --net option to docker run.

[abhas]

I would be glad to help in adding this option if someone can give me a pointer on how to get started.

[quantverse]

+1

We need the support for the new networking model from Docker 1.9+.

Also good idea would be to define/create a network if necessary.