RFR: 8196367: java/awt/List/SingleModeDeselect/SingleModeDeselect.java times out [v2]

[Alexander Zuev]

> Clean up imports;
> Close and dispose frame before exiting the test;

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

  Use one tyr/catch instead of two
  Generic code cleanup

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8351/files
  - new: https://git.openjdk.java.net/jdk/pull/8351/files/7b86b9ba..fe4aee44

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8351&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8351&range=00-01

  Stats: 14 lines in 1 file changed: 5 ins; 7 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8351.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8351/head:pull/8351

PR: https://git.openjdk.java.net/jdk/pull/8351