[11u] RFR (XS): 8261753: Test java/lang/System/OsVersionTest.java still failing on BigSur patch versions after JDK-8253702

[Langer, Christoph]

Hi,

please review the backport of this test fix. I requested backport of JDK-8253702 already which applies clean. However, when building on Mac with Xcode <12 and running on MacOS versions that have a patch version number (>0), OsVersionTest is still bound to fail.

I had to do a minor context adaption in the test imports.

Bug: https://bugs.openjdk.java.net/browse/JDK-8261753
Original Change: https://git.openjdk.java.net/jdk/commit/8ba390d1
Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8261753.11u/

Thanks
Christoph