[jdk13u-dev] RFR: 8257858: [macOS]: Remove JNF dependency from libosxsecurity/KeystoreImpl.m

[Vladimir Kempik]

Backport to jdk13u-dev.
Applies almost clean, few gmk files had different filename and few copyright year issues.

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Commit messages:
 - 8257858: [macOS]: Remove JNF dependency from libosxsecurity/KeystoreImpl.m 8257860: [macOS]: Remove JNF dependency from libosxkrb5/SCDynamicStoreConfig.m

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/169/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=169&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257858
  Stats: 805 lines in 12 files changed: 369 ins; 317 del; 119 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/169.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/169/head:pull/169

PR: https://git.openjdk.java.net/jdk13u-dev/pull/169