message: ResourceGroupName and budgetName are method params
diff: "in": "path",
  "description": "Azure Resource Group Name.",
  "required": true,
  - "type": "string"
  + "type": "string",
  + "x-ms-parameter-location": "method"
  },
  "budgetNameParameter": {
  "name": "budgetName",
  "in": "path",
  "description": "Budget Name.",
  "required": true,
  - "type": "string"
  + "type": "string",
  + "x-ms-parameter-location": "method"
  },
  "billingPeriodNameParameter": {
  "name": "billingPeriodName",
  