<Swing Dev> RFR: 8272232: javax/swing/JTable/4275046/bug4275046.java failed with "Expected value in the cell: 'rededited' but found 'redEDITED'."

[Prasanta Sadhukhan]

The test fails in CI testing citing expected "rededited" but found "redEDITED", which seems to point to fact that either there is a CAPS_LOCK key switched on or some other test did not use SHIFT key corectly  ie, pressed but not released.

Considering many more tests would have failed if CAPS_LOCK is turned on, I tried to find if some tests uses SHIFT key mistakenly and it seems JRadioButton test has press/release order wrong and it uses SHIFT. Rectified that.

In addition, corrected some known CI issues ie waiting after frame is made visible, made frame to centre. Along with that, also modified testcase to check lowercase string. Since the original JDK-4275046 issue is about newly entered text is made part of cell or not, it does not matter if it's in lowercase/uppercase and if such CAPS_LOCK or Shift key problem happens again, this test will not be affected.

CI run for several iterations running these 2 tests one after another in all platforms is green.

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Commit messages:
 - 8272232: javax/swing/JTable/4275046/bug4275046.java failed with Expected value in the cell: 'rededited' but found 'redEDITED'.

Changes: https://git.openjdk.java.net/jdk/pull/5079/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5079&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272232
  Stats: 5 lines in 2 files changed: 4 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5079.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5079/head:pull/5079

PR: https://git.openjdk.java.net/jdk/pull/5079