Project: mesos
Issue MESOS-4282: Update isolator prepare function to use ContainerLaunchInfo
Currently we have the isolator's prepare function returning ContainerPrepareInfo protobuf. We should enable ContainerLaunchInfo (contains environment variables, namespaces, etc.) to be returned which will be used by Mesos containerize to launch containers. By doing this (ContainerPrepareInfo -> ContainerLaunchInfo), we can select any necessary information and passing then to launcher.
Story points: 2