[jdk11u-dev] RFR: 8310380: Handle problems in core-related tests on macOS when codesign tool does not work

[Andrew Lu]

Backport 8310380
add backports for JDK-8270199, JDK-8248194, JDK-8248667

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Commit messages:
 - Backport 39c104df44f17c1d65e35becd4272f73e2c6610c
 - Backport 39c104df44f17c1d65e35becd4272f73e2c6610c
 - Backport 39c104df44f17c1d65e35becd4272f73e2c6610c
 - Backport 39c104df44f17c1d65e35becd4272f73e2c6610c
 - Backport 83ffc1ac94b8893532d8663b9058592f1714d337

Changes: https://git.openjdk.org/jdk11u-dev/pull/2577/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2577&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310380
  Stats: 900 lines in 15 files changed: 651 ins; 165 del; 84 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2577.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2577/head:pull/2577

PR: https://git.openjdk.org/jdk11u-dev/pull/2577