[jdk8u-dev] RFR: 8309138: Fix container tests for jdks with symlinked conf dir [v2]

[SendaoYan]

> Hi all
> This is backport of JDK-8309138, to fix the testcase bug, which if the tested jdk directory is symlinked, symlinks are followed when copying tested jdk.
> Only change the testcase lib file, the risk is low.
> 
> This backport not clean, because of this PR include the same change to the Hotspot copy of `DockerTestUtils.java`
> 
> Additional testing:
> 
> - [x] jdk/test/jdk/internal/platform/docker
> - [ ] hotspot/test/runtime/containers/docker
> 
> [docker-tests.log](https://github.com/user-attachments/files/16124002/docker-tests.log)

SendaoYan has updated the pull request incrementally with two additional commits since the last revision:

 - include the same change in the Hotspot copy of DockerTestUtils.java
 - include the same change in the Hotspot copy of DockerTestUtils.java

-------------

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/538/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/538/files/4d1e313b..a89176e6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=538&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=538&range=00-01

  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/538.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/538/head:pull/538

PR: https://git.openjdk.org/jdk8u-dev/pull/538