[jdk17u-dev] RFR: 8315952: Open source several Swing JToolbar JTooltip JTree tests

[Goetz Lindenmaier]

I backport this for parity with 17.0.15-oracle

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Commit messages:
 - Backport d2b2f6759f7b9eb6df8eaa84b88e064c636b24a8

Changes: https://git.openjdk.org/jdk17u-dev/pull/3151/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3151&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315952
  Stats: 262 lines in 5 files changed: 262 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3151.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3151/head:pull/3151

PR: https://git.openjdk.org/jdk17u-dev/pull/3151