RFR(T) : 8243933 : use driver mode in gc tests

[Kim Barrett]

> On Apr 27, 2020, at 11:44 PM, Igor Ignatyev <igor.ignatyev at oracle.com> wrote:
> 
> http://cr.openjdk.java.net/~iignatyev//8243933/webrev.02
>> 74 lines changed: 1 ins; 2 del; 71 mod;
> 
> Hi all,
> 
> could you please review this trivial patch which updates 63 gc tests to use driver mode?
> from JBS:
>> this is to update (some) gc tests whose main test classes just fork JVM and check their output
> 
> webrev: http://cr.openjdk.java.net/~iignatyev//8243933/webrev.02
> JBS: https://bugs.openjdk.java.net/browse/JDK-8243933
> testing: the updated tests
> 
> Thanks,
> -- Igor

Looks good.  And despite the number of files changed, it does seem trivial.