[jdk11u-dev] RFR: 8299445: EndingDotHostname.java fails because of compilation errors

[Roman Marchenko]

The test fails because of compilation errors - the test uses jdk17 strings, they were not adapted for jdk11 when backported.
This fix uses approptiate string creation approach.

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Commit messages:
 - Fixed string issue

Changes: https://git.openjdk.org/jdk11u-dev/pull/1626/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1626&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299445
  Stats: 217 lines in 1 file changed: 64 ins; 67 del; 86 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1626.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1626/head:pull/1626

PR: https://git.openjdk.org/jdk11u-dev/pull/1626