RFR: 8273595: tools/jpackage tests do not work on apt-based Linux Distros like Debian

[Ao Qi]

A similar issue on Ubuntu has been fixed by [JDK-8238953](https://bugs.openjdk.java.net/browse/JDK-8238953). However, tools/jpackage tests do not work on Debian Linux or other apt-based Linux, when rpm package is installed. This issue proposes a general fix for apt-based Linux.

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Commit messages:
 - copyright year update and less import
 - 8273595: tools/jpackage tests do not work on apt-based Linux Distros like Debian

Changes: https://git.openjdk.java.net/jdk/pull/5462/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5462&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273595
  Stats: 20 lines in 2 files changed: 0 ins; 15 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5462.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5462/head:pull/5462

PR: https://git.openjdk.java.net/jdk/pull/5462