<AWT Dev> RFR: 8241806: The sun/awt/shell/FileSystemViewMemoryLeak.java is unstable

[Sergey Bylokhov]

The test may work up to 15 minutes on some systems.
The solution is to limit the time execution to 90 seconds.

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Commit messages:
 - Initial fix

Changes: https://git.openjdk.java.net/jdk/pull/923/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=923&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8241806
  Stats: 16 lines in 2 files changed: 13 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/923.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/923/head:pull/923

PR: https://git.openjdk.java.net/jdk/pull/923