RFR: 8308453: Convert JKS test keystores in test/jdk/javax/net/ssl/etc to PKCS12 [v9]

[Kevin Driver]

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

Kevin Driver has updated the pull request incrementally with one additional commit since the last revision:

  change getInstance to not require keystore type

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16159/files
  - new: https://git.openjdk.org/jdk/pull/16159/files/d309acdb..253ee1e1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16159&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16159&range=07-08

  Stats: 74 lines in 19 files changed: 4 ins; 34 del; 36 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