Fixing a regression caused by the fix to JDK-8356985. Although the fix in `CharsetTest` was a clean-up and not the gist of the original issue, the change seem to have caused not finding `SkippedException` at runtime in certain cases. Changing the test to JUnit based so that the offending `SkippedException` can be replaced with JUnit's `Assumptions`. Also renamed the test case itself to reflect what's actually tested in it.
------------- Commit messages: - args -> classpath - Renamed the test - initial commit Changes: https://git.openjdk.org/jdk/pull/25601/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25601&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8358158 Stats: 217 lines in 4 files changed: 112 ins; 105 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/25601.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/25601/head:pull/25601 PR: https://git.openjdk.org/jdk/pull/25601
