Save/restore default locale in test

[Simulant87]

fixes #1023

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[stleary]

What problem does this code solve?
Changing the default locale could affect other workflows. Save and restore the default for other maven tests.

Does the code still compile with Java6?
Yes

Risks
Low

Changes to the API?
No

Will this require a new release?
No

Should the documentation be updated?
No

Does it break the unit tests?
No, it fixes a test that leaks a locale change

Was any code refactored in this commit?
No

Review status

APPROVED

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