RFR: 8275851: Deproblemlist open/test/jdk/javax/swing/JComponent/6683775/bug6683775.java

[Prasanta Sadhukhan]

Test was problemlisted long time back by JDK-8193211 but it is passing now..Modified testFrame access in EDT and dispose in finally block for better safeguard. Problemlisted test was marked for 8u so did not close it..
Several iterations of the test pass in all platforms in mainline..

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Commit messages:
 - 8275851: Deproblemlist open/test/jdk/javax/swing/JComponent/6683775/bug6683775.java
 - 8275851: Deproblemlist open/test/jdk/javax/swing/JComponent/6683775/bug6683775.java

Changes: https://git.openjdk.java.net/jdk/pull/6097/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6097&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275851
  Stats: 33 lines in 2 files changed: 7 ins; 2 del; 24 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6097.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6097/head:pull/6097

PR: https://git.openjdk.java.net/jdk/pull/6097