<AWT Dev> [jdk17] RFR: 8015886: java/awt/Focus/DeiconifiedFrameLoosesFocus/DeiconifiedFrameLoosesFocus.java sometimes failed on ubuntu

[Alexander Zvegintsev]

This test can fail pretty consistently on some slow systems. Increased delay fixes the issue. 
We do have similar fix in #260

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Commit messages:
 - initial

Changes: https://git.openjdk.java.net/jdk17/pull/272/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=272&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8015886
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/272.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/272/head:pull/272

PR: https://git.openjdk.java.net/jdk17/pull/272