[9] Review request for 8163167: [PIT] javax/swing/JTextArea/ScrollbarFlicker/ScrollFlickerTest.java always fail

[Semyon Sadetsky]

Hello,

Please review fix for JDK9:
bug: https://bugs.openjdk.java.net/browse/JDK-8163167

webrev: http://cr.openjdk.java.net/~ssadetsky/8163167/webrev.00/

The cause of this test bug is revalidating JScrollPane layout may take 
various number of iterations on different L&Fs.

To fix the test the counter listener is added after the layout 
revalidation has been started.

--Semyon