`docker inspect …` to discover `IPAddress` doesn't work with `--net=…`

[michaelsembwever]

See https://stackoverflow.com/questions/43803849/my-docker-container-does-not-have-ip-address-why

When --net=… is used, this line will not work: https://github.com/datastax/diagnostic-collection/blob/master/ds-collector/ds-collector#L178

[gfelot]

In later versions of Docker --net has been renamed --network