test: force English locale in execute* tests to match expected logs

Author: currenjin

platform-tooling-support-tests/src/test/java/platform/tooling/support/tests/StandaloneTests.java

@@ -405,6 +405,7 @@ void execute(@FilePrefix("console-launcher") OutputFiles outputFiles) throws Exc
 				.addArguments("-enableassertions") //
 				.addArguments("-Djava.util.logging.config.file=logging.properties") //
 				.addArguments("-Djunit.platform.launcher.interceptors.enabled=true") //
+				.addArguments("-Duser.language=en", "-Duser.country=US") //
 				.addArguments("-jar", MavenRepo.jar("junit-platform-console-standalone").toString()) //
 				.addArguments("execute") //
 				.addArguments("--scan-class-path") //
@@ -517,6 +518,7 @@ void executeWithJarredTestClasses(@FilePrefix("jar") OutputFiles jarOutputFiles,
 				.addArguments("-enableassertions") //
 				.addArguments("-Djava.util.logging.config.file=logging.properties") //
 				.addArguments("-Djunit.platform.launcher.interceptors.enabled=true") //
+				.addArguments("-Duser.language=en", "-Duser.country=US") //
 				.addArguments("-jar", MavenRepo.jar("junit-platform-console-standalone").toString()) //
 				.addArguments("execute") //
 				.addArguments("--scan-class-path") //