RFR: 8017175: [TESTBUG] javax/swing/JPopupMenu/4634626/bug4634626.java sometimes failed on mac [v3]

[Alexander Zuev]

> Moved Swing component modification to the EDT.
> Increased wait time for popup to show up.
> Made checking variabled volatile.
> Generic code cleanup.
> Removed the test from ProblemList.txt

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Moved components instantiation to the EDT

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6104/files
  - new: https://git.openjdk.java.net/jdk/pull/6104/files/f409cf19..1f69582f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6104&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6104&range=01-02

  Stats: 55 lines in 1 file changed: 19 ins; 10 del; 26 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6104.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6104/head:pull/6104

PR: https://git.openjdk.java.net/jdk/pull/6104