[Failure]commentController: Fail to get comment: ground dose not exist

[harveylo]

• Commit: 60f7233
• Priority: medium
• Description: get should fail and return 404 but the result is 200
• Error output: { "status": 200, "responseMap": { "result": [] } }

[HatsuneMK00]

fix in commit 63b99651e5638064a65df8ea09eb4932d6862539 -> 检查场馆不存在时返回404