RFR: 8320706: RuntimePackageTest.testUsrInstallDir test fails on Linux

[Alexey Semenyuk]

8320706: RuntimePackageTest.testUsrInstallDir test fails on Linux

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Commit messages:
 - 8320706: RuntimePackageTest.testUsrInstallDir test fails on Linux

Changes: https://git.openjdk.org/jdk/pull/16810/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16810&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320706
  Stats: 11 lines in 1 file changed: 7 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/16810.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16810/head:pull/16810

PR: https://git.openjdk.org/jdk/pull/16810