RFR: 7903430: Improve reporting for errors in JUnit's lifecycle methods [v2]

[Christian Stein]

> Please review this change set ensuring that all exceptions thrown in JUnit's lifecycle methods are reported.
> 
> Prior to this PR, only exceptions thrown by "test identifiers" were reported.
> Now all kinds of identifiers, which include "container identifiers", are generating a report when the execution result is in `ABORTED` or `FAILED` state.

Christian Stein has updated the pull request incrementally with one additional commit since the last revision:

  Remove unused code and fix indentation

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Changes:
  - all: https://git.openjdk.org/jtreg/pull/147/files
  - new: https://git.openjdk.org/jtreg/pull/147/files/6f0be2dd..cb8bbb07

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jtreg&pr=147&range=01
 - incr: https://webrevs.openjdk.org/?repo=jtreg&pr=147&range=00-01

  Stats: 26 lines in 1 file changed: 8 ins; 11 del; 7 mod
  Patch: https://git.openjdk.org/jtreg/pull/147.diff
  Fetch: git fetch https://git.openjdk.org/jtreg pull/147/head:pull/147

PR: https://git.openjdk.org/jtreg/pull/147