This is a simple test fix. Issue : https://bugs.openjdk.java.net/browse/JDK-8245634
After fixing [JDK-8245457,](https://bugs.openjdk.java.net/browse/JDK-8245457) I found that there are more ignored tests of similar nature that can be enabled and fixed. A search for ignored tests with message "impl_cssSet API removed" - revealed a total 6 occurrences in 4 files - 1) CellTest 2) CheckBoxTest 3) ChoiceBoxTest 4) DateCellTest This PR enables and fixes these tests. ------------- Commit messages: - enable ignored unit tests Changes: https://git.openjdk.java.net/jfx/pull/239/files Webrev: https://webrevs.openjdk.java.net/jfx/239/webrev.00 Issue: https://bugs.openjdk.java.net/browse/JDK-8245634 Stats: 65 lines in 4 files changed: 48 ins; 7 del; 10 mod Patch: https://git.openjdk.java.net/jfx/pull/239.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/239/head:pull/239 PR: https://git.openjdk.java.net/jfx/pull/239
