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

[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.

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Commit messages:
 - fixed Whitespace error: del tab
 - 8316563: test tools/jpackage/linux/LinuxResourceTest.java fails on RHEL8 and Fedora 27

Changes: https://git.openjdk.org/jdk/pull/15832/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15832&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316563
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 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