message: Add possible value set for Livy states
diff: },
  "state": {
  "type": "string",
  - "description": "The batch state"
  + "description": "The batch state",
  + "enum": [
  + "not_started",
  + "starting",
  + "idle",
  + "busy",
  + "shutting_down",
  + "error",
  + "dead",
  + "killed",
  + "success",
  + "running",
  + "recovering"
  + ],
  + "x-ms-enum": {
  + "name": "LivyStates",
  + "modelAsString": true
  + }
  },
  "log": {
  "x-ms-client-name": "logLines",
  "x-nullable": true
  },
  "state": {
  - "type": "string"
  + "type": "string",
  + "description": "The session state.",
  + "enum": [
  + "not_started",
  + "starting",
  + "idle",
  + "busy",
  + "shutting_down",
  + "error",
  + "dead",
  + "killed",
  + "success",
  + "running",
  + "recovering"
  + ],
  + "x-ms-enum": {
  + "name": "LivyStates",
  + "modelAsString": true
  + }
  },
  "log": {
  "x-ms-client-name": "logLines",
  "type": "string"
  },
  "state": {
  - "type": "string"
  + "type": "string",
  + "enum": [
  + "waiting",
  + "running",
  + "available",
  + "error",
  + "cancelling",
  + "cancelled"
  + ],
  + "x-ms-enum": {
  + "name": "LivyStatementStates",
  + "modelAsString": true
  + }
  },
  "output": {
  "$ref": "#/definitions/SparkStatementOutput",
  