RFR: 8277647: [REDO] JDK-8277507 Add jlink.debug system property while launching jpackage tests to help diagonize recent intermittent failures

[Jaikiran Pai]

Can I please get a review of this change which adds `jlink.debug=true` system property while launching `jpackage` tests?

The previous fix for this in https://github.com/openjdk/jdk/pull/6491 didn't take into account the part where the `jpackage` tool gets launched as a `ToolProvider` from some of these tests. This resulted in a large number of tests failing (across different OS) in `tier2` with errors like:


Error: Invalid Option: [-J-Djlink.debug=true]


In this current PR, the changed code now takes into account the possibility of `jpackage` being launched as a `ToolProvider` and in such cases doesn't add this option. To achieve this, the adding of this argument is delayed till when the actual execution is about to happen and thus it's now done in the `adjustArgumentsBeforeExecution()` method of the jpackage test framework.

With this change, I have now run the `jdk:tier2` locally on a macos instance and the tests have all passed:


Test results: passed: 3,821; failed: 3
Report written to jdk/build/macosx-x86_64-server-release/test-results/jtreg_test_jdk_tier2/html/report.html
Results written to jdk/build/macosx-x86_64-server-release/test-support/jtreg_test_jdk_tier2
Error: Some tests failed or other problems occurred.
Finished running test 'jtreg:test/jdk:tier2'
Test report is stored in build/macosx-x86_64-server-release/test-results/jtreg_test_jdk_tier2

==============================
Test summary
==============================
   TEST                                              TOTAL  PASS  FAIL ERROR   
>> jtreg:test/jdk:tier2                               3824  3821     3     0 <<
==============================

The 3 failing tests are unrelated to this change and belong to the `java/nio/channels/DatagramChannel/` test package.
Furthermore, I've looked into the generated logs of the following tests to verify that the `-J-Djlink.debug=true` does get passed in relevant tests and doesn't in those that failed previously in `tier2`:

test/jdk/tools/jpackage/share/MultiLauncherTwoPhaseTest.java
test/jdk/tools/jpackage/macosx/NameWithSpaceTest.java
test/jdk/tools/jpackage/share/ArgumentsTest.java

A sample from one of the logs where this system property is expected to be passed along:

> TRACE: exec: Execute [jdk/build/macosx-x86_64-server-release/images/jdk/bin/jpackage --input ./test/input --dest ./test/output --name "Name With Space" --type pkg --main-jar hello.jar --main-class Hello -J-Djlink.debug=true --verbose](15); inherit I/O...


I would still like to request someone with access to CI or other OSes (like Windows and Linux) to help test `tier2` against this PR.

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

Commit messages:
 - 8277647: [REDO] JDK-8277507 Add jlink.debug system property while launching jpackage tests to help diagonize recent intermittent failures

Changes: https://git.openjdk.java.net/jdk/pull/6534/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6534&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277647
  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6534.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6534/head:pull/6534

PR: https://git.openjdk.java.net/jdk/pull/6534