RFR: 8316053: Open some swing tests 3 [v2]

[Alisen Chung]

> Moving tests from closed to open
> 8 javax/swing/SwingGraphics/VolatileBackBuffer/MultimonVImage.java
> 9 javax/swing/SwingUtilities/4859570/bug4859570.java
> 10 javax/swing/SwingUtilities/4936652/bug4936652.java
> 11 javax/swing/ToolTipManager/4768127/bug4768127.java

Alisen Chung has updated the pull request incrementally with three additional commits since the last revision:

 - waitForIdle first
 - typo
 - updated based on comment feedback

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15851/files
  - new: https://git.openjdk.org/jdk/pull/15851/files/87b6f228..d3f848fb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15851&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15851&range=00-01

  Stats: 54 lines in 4 files changed: 17 ins; 17 del; 20 mod
  Patch: https://git.openjdk.org/jdk/pull/15851.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15851/head:pull/15851

PR: https://git.openjdk.org/jdk/pull/15851