Open-sourcing and standardizing several tests (JSplitPane JApplet JToolBar)
------------- Commit messages: - Initial add - Merge branch 'master' of github.com:DamonGuy/jdk - Merge branch 'master' of github.com:DamonGuy/jdk - Merge branch 'master' of github.com:DamonGuy/jdk - Initial commit for backout Changes: https://git.openjdk.org/jdk/pull/24559/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24559&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8352908 Stats: 353 lines in 4 files changed: 353 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/24559.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/24559/head:pull/24559 PR: https://git.openjdk.org/jdk/pull/24559
