SAMZA-438 modified the AM/local job factories (job coordinator) to pass configuration to SamzaContainer via an HTTP server. This ticket is to modify the other half of the pipeline: the config passing from the JobRunner to the job coordinator to be done via a ConfigStream, rather than an environment variable.
The goal of this ticket is to make the change as transparent as possible. control-job.sh won't be introduced in this ticket. Instead, we'll continue using the ConfigFactories that we have, but pass the resolved config to the coordinator using the ConfigStream rather than the environment variable.