RFR: 8308453: Convert JKS test keystores in test/jdk/javax/net/ssl/etc to PKCS12

[Kevin Driver]

JDK-8308453: JSSE regression test keystore migration from JKS to PKCS12

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Commit messages:
 - JDK-8308453: JSSE regression test keystore migration from JKS to PKCS12

Changes: https://git.openjdk.org/jdk/pull/16159/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16159&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308453
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/16159.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16159/head:pull/16159

PR: https://git.openjdk.org/jdk/pull/16159