RFR: 8315882: Open some swing tests 2

[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

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

Commit messages:
 - moving tests to open
 - named test frames
 - finished updating SpringLayoutSetWidthTest
 - changed tests
 - init commit

Changes: https://git.openjdk.org/jdk/pull/15850/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15850&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315882
  Stats: 270 lines in 4 files changed: 270 ins; 0 del; 0 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