RFR: 8316563: test tools/jpackage/linux/LinuxResourceTest.java fails on CentOS Linux release 8.5.2111 and Fedora 27 [v3]

[yaqsun]

> on some RHEL Linux 8.X and Fedora 27 machines , we run into errors in test tools/jpackage/linux/LinuxResourceTest.java.
> It's the same problem as https://bugs.openjdk.org/browse/JDK-8314121. 
> But after 8314121, tools/jpackage/linux/LinuxResourceTest.java still reappears. tools/jpackage/linux/LinuxResourceTest.java does not use file src/jdk.jpackage/linux/classes/jdk/jpackage/internal/resources/template.spec.

yaqsun has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - Merge branch 'openjdk:master' into 8316563
 - fixed Whitespace error: del tab
 - 8316563: test tools/jpackage/linux/LinuxResourceTest.java fails on RHEL8 and Fedora 27
 - fixed Whitespace error: del tab
 - 8316563: test tools/jpackage/linux/LinuxResourceTest.java fails on RHEL8 and Fedora 27

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15832/files
  - new: https://git.openjdk.org/jdk/pull/15832/files/06b690b5..f853fb13

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15832&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15832&range=01-02

  Stats: 60114 lines in 1685 files changed: 36198 ins; 14821 del; 9095 mod
  Patch: https://git.openjdk.org/jdk/pull/15832.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15832/head:pull/15832

PR: https://git.openjdk.org/jdk/pull/15832