[jdk13u-dev] RFR: 8242565: Policy initialization issues when the denyAfter constraint is enabled

[Alexey Bakhtin]

Almost clean backports instead of copyright year in the KeyStoreUtil.java and SignedJarTest.java

java/security tests passed

-------------

Commit messages:
 - Backport 3efd000036d276c73f3be83d1cb4a7c6da08d3e8

Changes: https://git.openjdk.org/jdk13u-dev/pull/416/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk13u-dev&pr=416&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8242565
  Stats: 23 lines in 6 files changed: 10 ins; 6 del; 7 mod
  Patch: https://git.openjdk.org/jdk13u-dev/pull/416.diff
  Fetch: git fetch https://git.openjdk.org/jdk13u-dev pull/416/head:pull/416

PR: https://git.openjdk.org/jdk13u-dev/pull/416