[jdk11u-dev] RFR: 8293232: Fix race condition in pkcs11 SessionManager

[Zdenek Zambersky]

Backport - fix for race condition in pkcs11 SessionManager.

Clean. Passed [jdk_security](https://github.com/zzambers/jdk-tester/actions/runs/4347091189/jobs/7593974147) tests.

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

Commit messages:
 - Backport 67f31bb90b62fafc71e18c4c10e0f7e1b6896dc4

Changes: https://git.openjdk.org/jdk11u-dev/pull/1797/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1797&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293232
  Stats: 7 lines in 1 file changed: 5 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1797.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1797/head:pull/1797

PR: https://git.openjdk.org/jdk11u-dev/pull/1797