[jdk17u-dev] RFR: 8303607: SunMSCAPI provider leaks memory and keys

[Mat Carter]

Backport 8303607

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Commit messages:
 - Backport 8303607

Changes: https://git.openjdk.org/jdk17u-dev/pull/1846/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1846&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303607
  Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1846.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1846/head:pull/1846

PR: https://git.openjdk.org/jdk17u-dev/pull/1846