message: Update some descriptions.
diff: },
  "stats": {
  "$ref": "#/definitions/JobStatistics",
  - "title": "Resource usage statistics for the entire lifetime of the job. The statistics may not be immediately available. The Batch service performs periodic roll-up of statistics. The typical delay is about 30 minutes."
  + "title": "Resource usage statistics for the entire lifetime of the job.",
  + "description": "This property is populated only if the CloudJob was retrieved with an expand clause including the 'stats' attribute; otherwise it is null. The statistics may not be immediately available. The Batch service performs periodic roll-up of statistics. The typical delay is about 30 minutes."
  }
  },
  "title": "An Azure Batch job."
  },
  "stats": {
  "$ref": "#/definitions/PoolStatistics",
  - "title": "Utilization and resource usage statistics for the entire lifetime of the pool. The statistics may not be immediately available. The Batch service performs periodic roll-up of statistics. The typical delay is about 30 minutes."
  + "title": "Utilization and resource usage statistics for the entire lifetime of the pool.",
  + "description": "This property is populated only if the CloudPool was retrieved with an expand clause including the 'stats' attribute; otherwise it is null. The statistics may not be immediately available. The Batch service performs periodic roll-up of statistics. The typical delay is about 30 minutes."
  }
  },
  "title": "A pool in the Azure Batch service."
  },
  "required": [ "coordinationCommandLine" ],
  "title": "Settings which specify how to run a multi-instance task.",
  - "description": "Multi-instance tasks are commonly used to support MPI tasks."
  + "description": "Multi-instance tasks are commonly used to support MPI tasks. In the MPI case, if any of the subtasks fail (for example due to exiting with a non-zero exit code) the entire multi-instance task fails. The multi-instance task is then terminated and retried, up to its retry limit."
  },
  "TaskStatistics": {
  "properties": {
  