RFR: 8315882: Open some swing tests 2 [v4]

[Alisen Chung]

> Moving some tests to open
> 5 javax/swing/ScrollPaneLayout/4688907/bug4688907.java
> 6 javax/swing/SpringLayout/4756178/bug4756178.java
> 7 javax/swing/SpringLayout/4803649/bug4803649.java

Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:

  updated tests based on feedback

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15850/files
  - new: https://git.openjdk.org/jdk/pull/15850/files/8dbfe463..ae558c94

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15850&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15850&range=02-03

  Stats: 21 lines in 3 files changed: 12 ins; 1 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/15850.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15850/head:pull/15850

PR: https://git.openjdk.org/jdk/pull/15850