[jdk8u-dev] RFR: 8293232: Fix race condition in pkcs11 SessionManager

Wed Mar 15 15:27:44 UTC 2023

Backport from [jdk11u-dev](https://github.com/openjdk/jdk11u-dev/commit/939741c0a0a4a5ce2c68d14b15e1f42563bc653d) - fix for race condition in pkcs11 SessionManager.

Clean except for copyright date.

Testing:
[jdk_security](https://github.com/zzambers/jdk-tester/actions/runs/4427088716/jobs/7764206204) OK (no regressions to [master](https://github.com/zzambers/jdk-tester/actions/runs/4407115132/jobs/7720330395)).

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Commit messages:
 - Backport 939741c0a0a4a5ce2c68d14b15e1f42563bc653d

Changes: https://git.openjdk.org/jdk8u-dev/pull/288/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=288&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/jdk8u-dev/pull/288.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev pull/288/head:pull/288

PR: https://git.openjdk.org/jdk8u-dev/pull/288