RFR 8216535: tools/jimage/JImageExtractTest.java timed out

[Sundararajan Athijegannathan]

Please review.

Bug: https://bugs.openjdk.java.net/browse/JDK-8216535
Webrev: https://cr.openjdk.java.net/~sundar/8216535/webrev.00/

I'm creating a small jre image with just java.base and jdk.zipfs modules 
it. The lib/modules of that small jre is extracted for the test purpose. 
This reduces time taken -  elapsed time in jtreg log is 26656 vs 83445 
(earlier). I hope this should solve timeout issues seen in the test runs.

Thanks,
-Sundar