[jdk25u-dev] RFR: 8365398: TEST_BUG: java/rmi/transport/checkLeaseInfoLeak/CheckLeaseLeak.java failing intermittently

[Roland Mesde]

Backporting JDK-8365398: TEST_BUG: java/rmi/transport/checkLeaseInfoLeak/CheckLeaseLeak.java failing intermittently.

For parity with Oracle JDK. Increased available object count threshold to 6 (half of total created objects) to fix intermittent macOS test failures caused by slower garbage collection. 

Merge conflict (resolved) was a change in class import ordering and the correction of a comment.

Ran GHA Sanity Checks (passed), jtreg tier1 tests (passed) and related tests (passed) on linux-x64, linux-aarch64, macos-aarch64 and windows-x64:

(Passed) - make test-tier1
(Passed) - make test TEST=test/jdk/java/rmi/transport

Results are attached.

[linux-aarch64-jtreg-tier1.log](https://github.com/user-attachments/files/23911453/linux-aarch64-jtreg-tier1.log)
[linux-aarch64-specific-test.log](https://github.com/user-attachments/files/23911454/linux-aarch64-specific-test.log)
[linux-x64-jtreg-tier1.log](https://github.com/user-attachments/files/23911455/linux-x64-jtreg-tier1.log)
[linux-x64-specific-test.log](https://github.com/user-attachments/files/23911457/linux-x64-specific-test.log)
[macos-aarch64-jtreg-tier1.log](https://github.com/user-attachments/files/23911458/macos-aarch64-jtreg-tier1.log)
[macos-aarch64-specific-test.log](https://github.com/user-attachments/files/23911459/macos-aarch64-specific-test.log)
[windows-x64-jtreg-tier1.log](https://github.com/user-attachments/files/23911460/windows-x64-jtreg-tier1.log)
[windows-x64-specific-test.log](https://github.com/user-attachments/files/23911461/windows-x64-specific-test.log)

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

Commit messages:
 - Merge branch 'master' into JDK-8365398-V25-DEV-2
 - Backport 4b4d0cd35a32448e4b056109c502af2765766432

Changes: https://git.openjdk.org/jdk25u-dev/pull/46/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=46&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8365398
  Stats: 20 lines in 1 file changed: 14 ins; 1 del; 5 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/46.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/46/head:pull/46

PR: https://git.openjdk.org/jdk25u-dev/pull/46