8227077: Test java/awt/Modal/ZOrderTest6271792/ZOrderTest.java fails

[pankaj-bansal]

Test java/awt/Modal/ZOrderTest6271792/ZOrderTest.java fails on Ubuntu 19.04 and Ubuntu 20.04. The test always fail on mach5 and locally.

Issue: The test create frames and then does robot mouse clicks on frame title. The frames are of less width and on some systems, the robot clicks the minimize button on the frame while clicking the frame title. This results in test failure in further steps.
Fix: Increased the frames dimensions to remove this issue. Also, used variables to define the dimension instead of using the dimension values for all the frames individually.
Along with this change, the fix also does lot of cleanup. For example, added proper robot delays and removed Thread.sleeps. Added autoDelay on Robot, removed lot of code for test machinery and lot of unnecessary functions, disposed the frames at end.
The test is moved from closed to open repo, so looks like a new test. I have run mach5 job with multiple iterations. Link in the JBS.

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Progress

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Testing

	Linux x64	Windows x64	macOS x64
Build	✔️ (5/5 passed)	✔️ (2/2 passed)	✔️ (2/2 passed)
Test (tier1)	✔️ (9/9 passed)	✔️ (9/9 passed)	✔️ (9/9 passed)

Issue

• JDK-8227077: Test java/awt/Modal/ZOrderTest6271792/ZOrderTest.java fails

Download

$ git fetch https://git.openjdk.java.net/jdk pull/617/head:pull/617
$ git checkout pull/617

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