[11u] RFR:8214230: Classes generated by SystemModulesPlugin.java are not reproducable

[hedongbo]

Hi,



Please review the backport of JDK-8214230 to 11u:



Bug: https://bugs.openjdk.java.net/browse/JDK-8214230



Original commit: http://hg.openjdk.java.net/jdk/jdk/rev/abccada595dd



11u webrev: http://cr.openjdk.java.net/~dongbohe/8214230/webrev.00/



Patch applies cleanly to11u, but I added a static method `mismatch(Path, Path)` to the test file because it only exists in jdk12[1]. Moreover, I also modified the copyright year.


Tested with tier1, tier2. No regression in tests.





[1] https://bugs.openjdk.java.net/browse/JDK-8202302


Thanks,
dongbohe