RFR(T) : 8243946 : serviceability/sa tests fail after JDK-8243928

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8243946/webrev.00
> 2 lines changed: 0 ins; 0 del; 2 mod;

Hi all,

(so now it's my time to apology for inconvenience)

could you please review this small follow-up fix/partial revert of 8243928[1]? serviceability/sa/TestCpoolForInvokeDynamic.java  and TestDefaultMethods.java test use non-exported API so they can't be run in driver mode (b/c jtreg use vanilla JVM for driver code, meaning even exports from @modules tags are ignored)

JBS: https://bugs.openjdk.java.net/browse/JDK-8243946
testing: test/hotspot/jtreg/serviceability (in progress)
webrev: http://cr.openjdk.java.net/~iignatyev//8243946/webrev.00

[1]  https://bugs.openjdk.java.net/browse/JDK-8243928

Thanks,
-- Igor