RFR: 8309214: sun/security/pkcs11/KeyStore/CertChainRemoval.java fails after 8301154

[Valerie Peng]

This change addresses the scenario where a certificate is first stored as part of a certificate chain and then stored again as a certificate corresponding to a PrivateKey entry. Newer version of NSS errors out with CKR_GENERAL_ERROR with the 2nd store, i.e. C_CreateObject() call.

Proposed fix is to check for match before calling C_CreateObject(), if a match is found, set its alias instead.

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Commit messages:
 - 8309214: sun/security/pkcs11/KeyStore/CertChainRemoval.java fails after 8301154

Changes: https://git.openjdk.org/jdk/pull/15146/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15146&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309214
  Stats: 53 lines in 2 files changed: 39 ins; 12 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/15146.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15146/head:pull/15146

PR: https://git.openjdk.org/jdk/pull/15146