[jdk11u-dev] RFR: 8257497: Update keytool to create AKID from the SKID of the issuing certificate as specified by RFC 5280

[Martin Doerr]

Backport of JDK-8257497. The actual fix applies cleanly. Copyright year update doesn't. The test CheckCertAKID.java uses KnownOIDs which is not part of the JDK in 11u. We're using a copy in the test library instead. Skipped changes in ExtOptionCamelCase.java which belongs to JDK-8231950 which is not in 11u.

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Commit messages:
 - Backport 05301f5fd2b5f2357024a3d7bb788270861220a8

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/167/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=167&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257497
  Stats: 149 lines in 2 files changed: 138 ins; 7 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/167.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/167/head:pull/167

PR: https://git.openjdk.java.net/jdk11u-dev/pull/167