[BUG] [Java Service]"German (Unknown Script)" is shown as displayName for "de-1901" locale with language-variant format.

[lyiyu66]

Describe the bug commit: c7afc3bee93563af3c7073adfdd5cbd9b584ca0e "German (Unknown Script)" is shown as displayName for "de-1901" locale with language-variant format.

To Reproduce Steps to reproduce the behavior:

1. Put a json file with name: messages_de-1901.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"

{
        "languageTag": "de-1901",
        "displayName": "German (Unknown Script)",
        "displayName_sentenceBeginning": "German (Unknown Script)",
        "displayName_uiListOrMenu": "German (Unknown Script)",
        "displayName_standalone": "German (Unknown Script)"
      }

Expected behavior Display with language(variant) format: German (Traditional German orthography)