Some changes to JSliderDemoTest: set a non-default driver and additional diagnostics
------------- Commit messages: - JDK-8258645: Bring Jemmy 1.3.11 to JDK test base Changes: https://git.openjdk.java.net/jdk/pull/1831/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1831&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8258645 Stats: 123 lines in 9 files changed: 69 ins; 9 del; 45 mod Patch: https://git.openjdk.java.net/jdk/pull/1831.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/1831/head:pull/1831 PR: https://git.openjdk.java.net/jdk/pull/1831
