[8u] RFR: 8242480: Negative value may be returned by getFreeSwapSpaceSize() in the docker

[Severin Gehwolf]

Hi,

Please review this backport for Oracle JDK parity. The JDK 11 patch did
apply cleanly after JDK-8221710 which is in the approval queue, but the
test was not working and needed some fixes:

 * Common.java in OpenJDK 8u uses unified logging VM args. Used
   -XX:+UnlockDiagnosticVMOptions -XX:+PrintContainerInfo instead.
 * The test library location needed updates

Bug: https://bugs.openjdk.java.net/browse/JDK-8242480
webrev: https://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8242480/jdk8/01/webrev/

Testing: Regression test on Linux x86_64. Failed before, passes after.

Thoughts?

Thanks,
Severin