docker_container: Add support for id in networks_advanced block

[captn3m0]

Terraform Version

v0.11.13

Affected Resource(s)

Please list the resources as a list, for example:

• docker_container

Terraform Configuration Files

resource "docker_container" "c" {
// name, image etc
networks_advanced = [
  {
    name = "${docker_network.n.id}"
  }
]
}

resource "docker_network" "n" {
  name = "network-name"
}

Right now, docker_network resource only exports the id, which is not consumed by the docker_container resource. This issue means I can't connect a network with a container as a dependency graph.

[tomalok]

This is exactly the opposite problem that docker_service has... #160