When getting locale message, default locale to LocaleContextHolder when locale is null

[ianwallen]

When getting locale message, default locale to LocaleContextHolder when locale is null

It was noticed that if we did something like the following when calling an api.

throw new WebApplicationException().withMessageKey("message.key"));

The API Error would contain the message based on the key as follow

"message.key"

The reason for this is because no locale was identified in the exception. If we do the following
 
throw new WebApplicationException().withMessageKey("message.key").withLocale(LocaleContextHolder.getLocale());

Then the API Error would contain the message on the key as follow

"Some Text for locale"

Since it is better to show text to the end users instead of showing the message key, this PR will default the message key to LocaleContextHolder.getLocale() automatically so that we don't need to supply it for each exception raised.

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[josegar74]

Thanks @ianwallen. I notice the issue working with #7519, but didn't have time to investigate further.

[ianwallen]

Fixed issue related to code smell

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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