private RemoteJobPlanner createRemoteJobPlanner(ApplicationDescriptorImpl<? extends ApplicationDescriptor> appDesc) {
    return spy(new RemoteJobPlanner(appDesc));
  }
Unit tests for {@link RemoteJobPlanner}

TODO: consolidate this with unit tests for ExecutionPlanner after SAMZA-1811
samza-core/src/test/java/org/apache/samza/execution/TestRemoteJobPlanner.java