HOP-4597: Ignore variant value and script code when match default locale

[shlxue]

The current localeCodes only contains: language and country information.

JDK 11 Supported Locales

[hansva]

isn't the fact that String defaultLocaleString = HopConfig.readOptionString(STRING_DEFAULT_LOCALE, null); returns the value from our default hop-config.json the issue that is goes to english?

[shlxue]

If the file(hop-config.json) not exist, or not found key LocaleDefault(STRING_DEFAULT_LOCALE) in the config file, HOP always using en_US, but my default locale is zh_CN.
we should automatically match the environment language.

[shlxue]

When found key LocaleDefault(STRING_DEFAULT_LOCALE) in hop-config.json, It work fine.
But I found that some users would clear the config directory.

[shlxue]

In Chinese environment: Locale.getDefault().toString() return: zh_CN_#Hans
But in GlobalMessages.localeCodes: zh_CN

[hansva]

thanks for testing this out! I thought the error was because of the hop-config.json we added by default. but I checked and the defaultlocale is not in there !