Livy batch object
Batch session APIs operate on batch objects, defined
        as follows:
| Property | Description | Type | 
|---|---|---|
| id | A non-negative integer that represents a specific batch session | int | 
| appId | The application ID for this session | String | 
| appInfo | Detailed application info | Map of key=value | 
| log | Log records | list of strings | 
| state | Batch state | string | 
