RFR: 8154759: [TESTBUG] GC tests should be changed to be able to execute with -Xlog:all=trace.

[Michail Chernov]

Hi,


>>> HI Jon,
>>>
>>> This is the way to remove new unified logging options, like 
>>> -Xlog:all=trace or -Xlog:gc*=trace. Tests define -Xlog:... inside 
>>> for checking,
>> Sorry, but I still don't understand.  "Tests define -Xlog:..." means 
>> that the tests
>> have built into them unified logging style flags?
>
> Michail used not proper wording "will conflict". The flags of the 
> tests and possible external -Xlog flags will not conflict, but the 
> test might fail, if external options turn more logging on.
> The fix protects the test from extra logging.
>
> Michail, the fix looks good to me.
>

Dima, thanks for your review. Your explanation describes reason of this 
change correctly. External -Xlog* flags can make logging level more 
detailed than tests wait for.

Thanks,
Michail
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