Simplify test rig related to timeouts#3445

Merged

parrt merged 21 commits intoantlr:masterfrom

parrt:simplify-test-rig-re-timeouts

Dec 30, 2021

Commits on Dec 29, 2021

remove all -q quiet mvn options to see output on CI servers.
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use { } always
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run the various unit test classes in parallel rather than each individual test method... probably creates a lot of threads otherwise. I think it's an appropriate level of granularity to do it at t…
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dang. missed some of the scripts because they didn't have parallel execution set at all. all should now be `-Dparallel=classes -DthreadCount=4`
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ok, back off threading for c++ for moment.
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C#: Compile runtime project once per overall maven test session (assuming forkCount=0)
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fix C++ sync so we use BaseCppTest object not a static object that changes (runtimeBuiltOnce)
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use bigger machine at circleci
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Use a single VM for running each TestX.java file so anytime runtime lib builds can sync on TestX.class object.
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Wow: must revert forkCount=0. makes java runtime fail. wth?!
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try no test groups for C#, C++
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damn. still had sync messed up for C#.
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turn off groups for github actions too.
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