RFR: 8267095: Miscellaneous cleanups in vm.runtime.defmeth tests [v4]

[Vladimir Ivanov]

On Mon, 31 May 2021 11:23:04 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Miscellaneous refactorings/cleanups in `vm.runtime.defmeth` tests.
>> 
>> In particular: 
>>   - replace `test/hotspot/jtreg/vmTestbase/vm/runtime/defmeth/scenarios` with enumeration of different test configurations in tests themselves; 
>>   - pass `TestBuilder` as a parameter and initiate test execution from executor; 
>>   - switch max class file version tested from 52 to 61 (`V17`); 
>>   - minor changes (cleanups, new test cases)
>> 
>> Testing:
>> - [x] vmTestbase/vm/runtime/defmeth/
>> - [x] hs-tier5-rt - hs-tier8-rt
>
> Vladimir Ivanov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Improve README

Thanks for the reviews, Harold and David.

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PR: https://git.openjdk.java.net/jdk/pull/4008