[BUG] [Java Service]Get 520 when requesting zh-Hant-alt-long language's display name with API /i18n/api/v2/locale/supportedLanguageList.

Describe the bug
commit: c7afc3bee93563af3c7073adfdd5cbd9b584ca0e
Get 520 when requesting zh-Hant-alt-long language's display name with API /i18n/api/v2/locale/supportedLanguageList.

To Reproduce
Steps to reproduce the behavior:

1. Put a json file with name: messages_zh-Hant-alt-long.json in VMwareVIPLocale&1.0.0 bundles.
2. Request its displayname with "http://serviceip:8091/i18n/api/v2/locale/supportedLanguageList?displayLanguage=en&productName=VMwareVIPLocale&version=1.0.0"

Get response below:
{"response":{"code":520,"message":"11","serverTime":""},"signature":"","data":null}

Expected behavior
zh-Hant-alt-long is in languages.json file.
"zh-Hant-alt-long": "Traditional Mandarin Chinese"

Additional context
Same behavior with other similar locale:
"zh-alt-long": "Mandarin Chinese",
"zh-alt-menu": "Chinese, Mandarin",
"yue-alt-menu": "Chinese, Cantonese"...