RFR: 8373710: Improve jpackage error reporting [v3]

[Alexey Semenyuk]

> - Append "Error: " prefix to error messages
> - Always print stack traces of internal exceptions, not only when running in verbose mode

Alexey Semenyuk has updated the pull request incrementally with one additional commit since the last revision:

  Fix test failure; Fix whitespaces

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28833/files
  - new: https://git.openjdk.org/jdk/pull/28833/files/6b6e8cad..a592354e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28833&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28833&range=01-02

  Stats: 4 lines in 2 files changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/28833.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28833/head:pull/28833

PR: https://git.openjdk.org/jdk/pull/28833