RFR: 8313613: Use JUnit in langtools/lib tests [v5]

[Christian Stein]

On Fri, 13 Oct 2023 03:05:38 GMT, Qing Xiao <xqoasis at openjdk.org> wrote:

>> Use JUnit Jupiter API in langtools/lib tests instead of TestNG. They are under test/langtools/lib/combo/tools/javac/combo/.
>> Modified tests that extend tools in CompilationTestCase and JavacTemplateTestBase to implement TestWatcher.
>
> Qing Xiao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Try to solve whitespace error

Looks good to me - and thanks for your patience!

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Marked as reviewed by cstein (Committer).

PR Review: https://git.openjdk.org/jdk/pull/15281#pullrequestreview-1676193119