mongodbwriter json模板及文档错误（未更新）

对于写入数据主键重复是否进行更新操作。
原始：
```json
"upsertInfo": {
"isUpsert": "",
"upsertKey": ""
}
```
实际当前commit版本`0af1933`应该指定为:
```json
"writeMode": {
"isReplace": "",
"replaceKey": ""
}
```

Locate the mongodbwriter JSON template and documentation associated with commit 0af1933; no file or test is named in the issue. Compare the documented upsertInfo fields with the current writeMode fields, then update the affected documentation and verify that the examples match the current configuration.

Written by the indexing model from the issue text.